CTFs

07CTF is a 36-hour Capture The Flag competition organized by team 0bscuri7y. The event features challenges across a variety of categories, including web, crypto, forensics, OSINT, misc, and reverse engineering. With tasks ranging from beginner-friendly to more advanced, 07CTF is designed to offer something for everyone. There is no team size limit. Challenges will be released in two waves to keep the competition engaging throughout its duration. Whether you're just starting out or looking for a serious test of your skills, 07CTF aims to provide a balanced and enjoyable experience for all participants. Start: 13 September 2025, 12:00 IST End: 15 September 2025, 00:00 IST Duration: 36 Hours Discord - https://discord.gg/McFJYRQ9DM Sponsors: OtterSec: Cash Prize Google: Infra sponsored by goo.gle/ctfsponsorship .xyz Domains

2025 Qiangwang International Elite Challenge on Cyber Mimic Defense Finals, 40 teams come to Nanjing, China fighting for awards.

It is an annual CTF event hold in Nanjing China. This year is the 8th time of this challenge. Top 30 teams will be invited to Nanjing China for the Qiangwang Finals, from Nov 26th to Nov 29th, 72-hour event https://discord.gg/Jvn67Me9na

The Chaos Computer Club's annual congress. Four days of talks, art, hardware, lockpicking and politics in Hamburg. Tickets go fast.

Welcome to the AMSI CTF 2025, a cybersecurity competition organized by the Association of Master Sécurité Informatique (AMSI) of Sorbonne Université. This exciting event brings together "la crème de la crème" of cybersecurity students to test their skills in a series of challenging security puzzles and scenarios. On June 13-14, participants will tackle various challenges across multiple categories including cryptography, web, reverse engineering, forensics, and more. Thanks to our sponsors : Orange Cyberdefense, Quakslab, Root-Me Pro, RedBull, and Aforp.

ASIS CTF Quals 2025

We going to start event of CTF in out city; WELCOME TO / ATLABYTE CTF Atlabyte: Celebrating the Opening of the ATLABYTE IT-Centre We are proud to announce the CTF Atlabyte, dedicated to the grand opening of the ATLABYTE IT-Centre — a new hub designed to bring together IT professionals, cybersecurity researchers, and hackers. The mission of the IT-Centre is to become a vibrant community space and a central meeting point for all those passionate about technology, innovation, and security. It is a place where knowledge is shared, skills are tested, and connections are forged. CTF Atlabyte is more than just a competition — it’s an opportunity to: - demonstrate your advanced technical expertise, - compete with some of the best minds in the field, - and claim your place as a true champion within the IT community. Become the first CTF Atlabyte Champion and leave your mark on the launch of this new centre for innovation and collaboration. Location: On-Site - Bishkek Happy Hacking our future cyber-defenders!

CTF от Альфа-Банка для студентов, айтишников и цтферов — в раздельных скорбордах. Вас ждут задания на безопасность в вебе, приложениях и инфраструктуре, криптографию, реверс‑инжиниринг и расследования инцидентов. 30 часов на решение. Можно участвовать в команде или индивидуально. <ul> <li>CTF-трек — открыт для всех без ограничений, сколько угодно человек в команде</li> <li>IT-трек — до 4 человек в команде, нельзя тем, кто работает в сфере безопасности или уже играл в 5 CTF</li> <li>Студенческий трек — до 4 человек, только студенты, нельзя студентам-безопасникам или уже игравшим в 5 CTF</li> </ul> На CTFtime загружаем результаты CTF-трека.

AlpacaHack is a new CTF platform for individual competitions. AlpacaHack Round 12 (Crypto) is the 12th CTF hosted by the AlpacaHack team, featuring 4 Crypto challenges. The challenges are designed with a wide range of difficulties, making them enjoyable for participants of all levels, including beginners. They are created by yu212.

AlpacaHack is a new CTF platform for individual competitions. AlpacaHack Round 13 (Crypto) is the 13th CTF hosted by the AlpacaHack team, featuring 4 Crypto challenges. The challenges are designed with a wide range of difficulties, making them enjoyable for participants of all levels, including beginners. They are created by soon-haari.

Third iteration of Amateurs CTF! Join our discord for more details: discord.gg/gCX22asy65 Email: contact@amateurs.team

OWASP AppSec Israel, a standout event, is born out of the diligent efforts of our dedicated team. Meet our team, striving to make AppSec Israel an unrivaled conference in the realm of security! Introducing AppSec-IL Capture the Flag! A compact, high-octane challenge set in the dynamic fields of Application Security, CI/CD, DevOps, Mobile, AI, and Cloud security. Get ready for a test of skill and strategy at this year's OWASP AppSec Israel conference!

Welcome to BCACTF 6.0!!! Returning for the sixth year in a row, this highschool CTF from the Bergen County Academies presents challenges in a variety of difficulties targeting everyone from beginners to CTF veterans! Infra sponsored by goo.gle/ctfsponsorship.

BDSec CTF 2025 is an international, 24-hour online jeopardy-style Capture The Flag competition organized by Knight Squad, a cybersecurity team from Bangladesh. Held annually, BDSec CTF is designed to push boundaries, encourage learning, and celebrate strategic brilliance in cybersecurity — open to participants around the globe. The event pays tribute to Bangladesh’s history of resistance and courage, drawing inspiration from the 1952 Language Movement and the 1971 Liberation War. In this CTF, your mind is your shield, and your keyboard is your weapon. Whether you're a student just entering the field or a seasoned infosec professional, BDSec CTF 2025 welcomes you to test your skills, think critically, and hack with honor. Think Fast, Hack Smart, Win The Game!! Registration is OPEN now → https://2025.bdsec-ctf.com Diamond Sponsor: OtterSec Standard Sponsors: Bugcrowd Parrot CTFs Bounty Security NS TechValley Community Partner: KS HackZone

Berlin's chapter of the global BSides movement. Single-day community conference with a strong European researcher lineup.

Community-organized infosec un-conference held the days before DEF CON. Single-track talks, a packed Pros vs. Joes CTF and a famously social hallway track.

Get ready for the inaugural BSides Mumbai Capture The Flag (CTF) 2025! This online Jeopardy-style CTF is open to everyone - from curious beginners to experienced ethical hackers. Whether you're sharpening your skills or just starting your journey, you'll find challenges tailored for all skill levels. Participants will compete across a wide range of categories, testing their creativity, technical expertise, and problem-solving abilities. Challenge Categories: Web Mobile (Android) Web3 Artificial Intelligence (AI) Cryptography Pwn Reverse Engineering Forensics Miscellaneous (Steganography, OSINT, Windows, Linux, Networking) Need assistance or have questions? Get in touch: ctf@bsidesmumbai.in Stay updated and connect with us: LinkedIn: https://in.linkedin.com/company/bsidesmumbai Whatsapp: https://chat.whatsapp.com/FOLa4NT7zHQ7AoDx4CgwEa Twitter: https://x.com/BSidesMumbai Facebook: https://www.facebook.com/bsidesmumbai Instagram: https://www.instagram.com/bsidesmumbai/ Discord: https://discord.gg/2KRGQWBGR3 Youtube: https://www.youtube.com/@BSidesMumbai

BelkaCTF is a digital forensics CTF held by Belkasoft, the vendor of Evidence Center X forensic toolkit. Unravel an investigation story by solving a series of diverse DFIR challenges. The CTF is open to both professional forensic analysts and enthusiastic amateurs. <i>* * * — Damn these blue screens to hell! — The Chief sucked on his cigar so hard I thought his lungs would surrender first. — Half the country's on pause! — Airports, hospitals, power plants… all crashed into that lovely blue abyss, — I nodded, lazily jamming a USB stick into my laptop. — Except one terminal. — Which one? — The dispatcher's workstation at the airport. Didn't BSOD like the rest — instead, it runs some weird locker, blasting propaganda: "Hit the streets on this date, show 'em who's boss..." The Chief let out a dry chuckle: — So, detective, what's your take? — My take? This ain't some script kiddie brag. Someone's playing crowd control through hijacked Windows boxes. He exhaled smoke slowly, eyes gleaming: — Then it's time we find out who woke up the streets from behind a ransom screen. — Already on autopilot, Chief. Just don’t mess with my coffee mug.</i>

Black Hat's European stop. Two days of training plus two days of briefings, with a particular focus on operational security, ICS and EU policy.

2025 edition of Black Hat USA at Mandalay Bay. Notable themes: agentic-AI security, supply chain attacks, and continued investment in defensive automation tracks.

The largest commercial information security conference. Four days of hands-on technical training followed by two days of briefings, a vendor expo and the Black Hat Arsenal open-source tools track.

Black Hat MEA in collaboration with Saudi Federation for Cybersecurity, Programming & Drones (SAFCSP) will host a CTF Tournament and powered by FlagYard Platform, with over 500 participants (125 teams) entering the final stages at different levels of competency: amateur, intermediate and expert. CTF competition run as a jeopardy-style competition and team based both in the qualification and final stages. Participants will be challenged across a range of categories during the competition including Web, Reverse Engineering, PWN, Crypto and Forensics. Qualification Round: - Date: 24 hours from 07 Sep 2025, 10:00 GMT (01:00 PM KSA Time) - Location: Online. Final Competition: - Date: 2-4 Dec 2025 during Black Hat MEA conference - Location: On-Site - Riyadh

?️ BlitzCTF 2025 – Presented by BlitzHack ? July 5th, 8:00 PM IST – July 7th, 8:00 AM IST Get ready for BlitzCTF 2025, the ultimate cybersecurity showdown hosted by BlitzHack! Whether you're a seasoned hacker or just stepping into the world of Capture the Flag, this competition is designed to test your skills, creativity, and speed across a wide range of categories. ? Categories: Pwn Crypto Forensics Web Reversing Misc Hardware OSINT ? Duration: 36 hours of non-stop hacking – From 5th July 8:00 PM IST to 7th July 8:00 AM IST ? Sponsors: Proudly sponsored by Altered Security and OtterSec ? Prizes: TBA – But rest assured, there’s more than glory on the line! Whether you're playing solo or with a team, mark your calendars, sharpen your tools, and get ready to Blitz your way to the top!

? Blue Arena – The Ultimate Forensics Battleground Step into the Blue Arena, a high-stakes digital warzone where only the sharpest minds will survive. Hosted by the renowned CSEM CTF platform, this forensics-specific Capture The Flag event challenges participants to dive deep into the world of cyber investigation and digital forensics. In this one-of-a-kind arena, you'll face thrilling, real-world inspired challenges — from dissecting encrypted files and analyzing memory dumps to tracing digital footprints and unmasking hidden artifacts in compromised systems. Your investigative instincts, speed, and precision will be pushed to the edge. Whether you're a cybersecurity student, an experienced analyst, or an ethical hacker with a passion for digital truth-seeking, the Blue Arena is your battlefield to showcase your skills, compete with global minds, and rise as a true cyber forensics warrior. ? Key Highlights: ? Forensics-only CTF challenges ? Memory analysis, file carving, log tracing, OSINT, and more ? Compete with elite participants from across the nation ? Live scoreboard, rewards, and certificates for top performers ? Immersive platform hosted on CSEM CTF ? Location: Online (CSEM CTF Platform) Are you ready to investigate, analyze, and conquer the arena? Join the Blue Arena — where every byte tells a story.

Get ready all cyber chefs and code connoisseurs, Brunnerne has cooked up their very first BrunnerCTF for all of you to enjoy! We have prepared a fresh batch of delicious challenges with all your favorite flavors: Web, forensics, rev, crypto, pwn, OSINT - but perhaps also a few secret ingredients to surprise your palette! The CTF is aimed mostly at home cooks with a bit of experience, but we have something for every taste: From an entire "Shake & Bake" category for those most comfortable sticking to instant noodles to a few chef's specials that will challenge even the most experienced Masterchefs. Site: https://ctf.brunnerne.dk/ Discord: https://discord.gg/ZSNXY2sjyJ Proudly sponsored by: - Campfire Security - CyberSkills - Bankdata - Hetzner (infrastructure): https://htznr.li/BrunnerCTF

BuckeyeCTF is run by students and alumni from Cyber Security Club @ Ohio State. BuckeyeCTF is intended to be beginner-friendly and is geared towards university teams, but there will be a wide range of difficulty. Format is jeopardy: web, reversing, binary exploitation, crypto, etc. with a focus on enjoyable problems. Three divisions: - Open (no team size limit) - U.S. Undergraduate & high school (no team size limit) - Ohio State (1-4 students) CTF site: https://ctf.osucyber.club

Crimson Defense CTF 2025 will be held on Saturday, September 20th from 10am to 10pm CDT! CDCTF is a virtual 12-hour Jeopardy-style Capture-the-Flag competition designed for collegiate-level players. All ability levels are welcome. This competition will not only provide satisfying challenges for seasoned players, but be a good introduction to CTFs for new ones! CDCTF is a team competition, you may have up to four participants per team. Universities may have multiple teams representing their school. There will be challenges of all difficulties representing the following categories: Reverse Engineering, Log & Network Traffic Analysis, Forensics, Password Cracking, Cryptography, Open Source Intelligence, and more! Registration is open! The link is on our website: https://uacrimsondefense.github.io/cdctf.html CDCTF is hosted and created by Crimson Defense Cyber Security Club at the University of Alabama.

Discord server: https://discord.gg/DxJVSy2xqx Event URL: https://ctf.compfest.id/ COMPFEST Website: https://compfest.id A CTF event organized by Computer Science students of Universitas Indonesia. The main event is aimed for Indonesian citizens, but everyone is welcome to participate in the mirror contest. *** Please keep in mind this event is a mirror event form an already held local event. Participants from that event may not join this event. ***

This CTF is intended for ethical security research and skill development across various domains. Any malicious behavior targeting infrastructure or external systems is strictly prohibited and will lead to immediate disqualification. 1. Eligibility Open to all cybersecurity enthusiasts, students, professionals, and hobbyists. Participants may compete individually or in teams of up to 3 members. All participants must commit to ethical conduct and fair play. 2. Challenge Categories Identity Access Management IMDS Leak Cloud Attacks AWS Cloud & Infrastructure Security AWS Azure GCP

This CTF is organized in association with CRACCON 2025. First preliminary round for global participants for CRACCON 2025 will take place on 6th September, 2025. Qualified teams will be given the opportunity in the final round which will take place offline on 4th October 2025. Join us on Oct 4-5th, 2025, at IIC, Delhi, for a full-day experience from 8 AM to 9 PM, packed with hacking challenges, workshops, networking, and exclusive opportunities to connect with leaders in tech.

the ctf challenge by CRHC Here is the contest discord server: https://discord.gg/exfgSVCXZK

Welcome to the CRMA mini CTF 2025 — a 24-hour internal cybersecurity challenge exclusively. This event is designed to strengthen cyber defense skills through hands-on challenges across categories including Web, Prog, Rev, Pwn and Mobile Security. Sponsored by: - No sponsors yet. Contact us if you're interested! Join us, rise to the challenge, and prove your skills. https://discord.gg/Mw48w29A

CSAW CTF is one of the oldest and biggest CTFs. Designed as an entry-level, jeopardy-style CTF, this competition is for students who are trying to break into the field of security, as well as for advanced students and industry professionals who want to practice their skills.

NOW STARTING SATURDAY 9/13 16:00 UTC Discord: https://discord.gg/cc6HrbAh CSAW CTF is one of the oldest and biggest CTFs with 1181 teams with 1+ points in 2024. Designed as an entry-level, jeopardy-style CTF, this competition is for students who are trying to break into the field of security, as well as for advanced students and industry professionals who want to practice their skills. Our competition occurs over two rounds: a Qualifying Round in September and a Final Round in November. Conference Sponsor - DTCC Rules: https://docs.google.com/document/u/2/d/e/2PACX-1vQd86UHImwnQxZoLFi8ShZ1DxP37dDegPyjWe40j9mIXlTdp5syPP5DAX0pGJXdpFxCVzklmVQ_wmld/pub

NYU Tandon's student-friendly competition; the qualifier feeds into regional finals.

NYU Tandon qualifier — student-friendly jeopardy feeding regional finals.

Chronos Security CTF 2025 is an online, international, jeopardy-style event that started as a one-student project. Now at its 3rd edition and past editions drew ~100 and ~250 participants, first in Sibiu, then nationally in Romania. Categories: crypto, forensics, linux, misc, osint, programming, rev, web. Difficulty: intermediate overall, both beginners and experienced players will enjoy the challenges. Three team brackets with separate scoreboards: Juniors (under 18), Seniors (over 18), Fighters (open),plus an overall board. We created the categories to separate experienced users (regardless of age - fighters) from everyone else and still allow juniors to compete. We focus on realism and clarity. No guesswork, clean UX, fast support. We are determined to help people learn and grow. Discord (rules, updates): https://discord.gg/GucSYEKvHP Website: https://www.chronos-security.ro/ctf

CyberCamp UMU CTF 3.0 is the third and final edition of the Capture The Flag competition organized by the University of Murcia as part of the CyberCamp UMU initiative. This is a free, 100% online, individual CTF, open to all skill levels. Whether you're just starting out in cybersecurity or you're an experienced player looking for a challenge, this event is for you. - IMPORTANT! ~ Only for spanish people - Dates: July 11–13, 2025 - Starts: Friday at 15:00 (CEST) – Ends: Sunday at 22:00 (CEST) - Format: Jeopardy-style | Individual | Online Categories include: - Web exploitation - Binary exploitation (PWN) - Cryptography - Forensics - And more surprises Join us, challenge yourself, and enjoy three intense days of hacking, learning, and fun. Are you ready?

RO: CTF@AC este un concurs de tip Capture the Flag (CTF) organizat de echipa de securitate cibernetică a Universității Politehnica Timișoara. Prin acest eveniment ne propunem: ✅ Promovarea culturii securității cibernetice ✅ Atragerea elevilor și studenților pasionați de IT și securitate Numar maxim de participanti per echipa: 3 Premii Premii în bani Discord: https://ctf.ac.upt.ro/discord Doar cei din categoria PARTICIPANT (sub 25 de ani) sunt eligibili pentru premii. Exista si o categorie OPEN pentru cei neeligibili la premii. EN: CTF@AC is a Capture the Flag (CTF) competition organized by the cybersecurity team of Politehnica University Timisoara. Through this event we aim to: ✅ Promote the culture of cybersecurity ✅ Attract students passionate about IT and security Max team size: 3 Prizes: Cash prizes Discord: https://ctf.ac.upt.ro/discord Only the PARTICIPANT category (<25yo) is eligible for the prizes. There is an OPEN category for people who want to play for fun.

RO: CTF@AC este un concurs de tip Capture the Flag (CTF) organizat de echipa de securitate cibernetică a Universității Politehnica Timișoara. Prin acest eveniment ne propunem: ✅ Promovarea culturii securității cibernetice ✅ Atragerea elevilor și studenților pasionați de IT și securitate Numar maxim de participanti per echipa: 3 Premii Premii în bani Discord: https://ctf.ac.upt.ro/discord Doar cei din categoria PARTICIPANT (sub 25 de ani) sunt eligibili pentru premii. Exista si o categorie OPEN pentru cei neeligibili la premii. EN: CTF@AC is a Capture the Flag (CTF) competition organized by the cybersecurity team of Politehnica University Timisoara. Through this event we aim to: ✅ Promote the culture of cybersecurity ✅ Attract students passionate about IT and security Max team size: 3 Prizes: Cash prizes Discord: https://ctf.ac.upt.ro/discord Only the PARTICIPANT category (<25yo) is eligible for the prizes. There is an OPEN category for people who want to play for fun.

We are happy to announce final Attack-Defense stage of CTFZONE 2025. Three lucky winners will receive $10000, $5000 and $3000 respectively. We are inviting TOP-10 performers of the first stage of CTFZONE 2025 Quals to participate in the game and are welcoming everyone to follow the progress of CTFZONE finals. Scoreboard and visualization will be available here: https://ctfz.zone The contest is supported by Yandex Cloud. Follow us on Twitter (https://twitter.com/ctfzone)

BI.ZONE is ready to announce the date of CTFZone Quals 2025! The first online stage will take place on August 16 at 10 AM (UTC) and will last for 24 hours. The stage format – Jeopardy – includes several categories: web, pwn, crypto, reverse and PPC. TOP-10 performers will proceed to the second online Attack/Defence stage of CTFZone in November 2025. The infrastructure of this event is sponsored by Yandex Cloud.

CipherHunt 2.0 is an onsite CTF by CypherLock at Chandigarh University as a continuation to last year's CipherHunt Sponsored by : 1. Altered Security 2. The SecOps Group 3. XYZ 4. CertifyMe

Crate-CTF is an annual Capture The Flag (CTF) competition organised by the Swedish Defence Research Agency in collaboration with the Swedish Armed Forces, designed to introduce high school and university students to the field of cybersecurity. After having over 1000 participants last year we return for our sixth CTF, with challenges for all skill levels from beginners to seasoned CTF players. The challenges are categorised into web exploitation, reverse engineering, binary exploitation, cryptography, forensics, OSINT, networking and the all-encompassing "other". While the event will be conducted in Swedish, international participants are also welcome to join (using translation tools as needed). Communication with challenge authors and administrators can be conducted in English.

CrewCTF is an annual cybersecurity Capture The Flag competition hosted by TheHackersCrew. With intermediate to expert level challenges, our contests are great opportunities for students and professionals to pick up, practice, and master skills in cybersecurity. Challenge containerization provides safe, hands-on environments for all contestants. As one of the top multinational teams, we greatly value diversity and inclusivity. Our CTFs are free and open to anyone with an internet connection. Team size : no limit Registration Link: https://2025.crewc.tf/register Categories: Crypto, Misc, Rev, Pwn, Web , Blockchain , PPC , hardware. discord : https://discord.gg/rW3dj7GhDq

Join CRYOVAULT 2025, a national-level Capture the Flag (CTF) hackathon organized by ISFCR (Information Security Forensics and Cyber Resilience) as part of Cybersecurity Awareness Month! Test your skills in a 24-hour online challenge on November 1, 2025, and qualify for the offline finale at PES University, RR Campus, on November 9, 2025. Form a team of 3 and compete for a prize pool worth ₹1.5 Lakh, along with consolation prizes of ₹3,000 for the top 9 runner-up teams. All participants will also receive cybersecurity vouchers. Sharpen your skills, tackle real-world challenges, and win big at CRYOVAULT 2025! Sponsor: XSSRAT Note: This is an in-person event requiring the shortlisted teams to attend the CTF at campus.

Join CRYOVAULT 2025, a national-level Capture the Flag (CTF) hackathon organized by ISFCR (Information Security Forensics and Cyber Resilience) as part of Cybersecurity Awareness Month! Test your skills in a 24-hour online challenge on November 1, 2025, and qualify for the offline finale at PES University, RR Campus, on November 9, 2025. Form a team of 3 and compete for a prize pool worth ₹1.5 Lakh, along with consolation prizes of ₹3,000 for the top 9 runner-up teams. All participants will also receive cybersecurity vouchers. Categories include crypto, web exploitation, rev, pwn, forensics, LLM/Agentic AI, osint, misc and blockchain. Sharpen your skills, tackle real-world challenges, and win big at CRYOVAULT 2025! Sponsor: XSSRAT Registration via this link: https://tinyurl.com/CRYOVAULT-CTF

Crypto CTF is an online competition for hackers to test, evaluate, and expand their skills in exploiting cryptography. In this CTF, we will provide various crypto challenges that focus on modern cryptography techniques. All crypto lovers are most welcome! Crypto CTF is a response to the longstanding complaints by CTF participants about the crypto challenges in CTF contests. In this brand-new tournament, we aim to provide crypto enthusiasts with fun and challenging pure crypto tasks that will truly test their passion for cryptography. Each task will be based on a specific cryptographic primitive or will involve a direct application of cryptography in other fields. The organizers of these tournaments generously offer their knowledge and skills to design original Crypto tasks and challenges for similar contests. Long Live Crypto :) Discord: https://discord.gg/RsvAJtF5Q5 Twitter: https://twitter.com/Crypto_CTF

The final event of Ctrl+Space CTF, the first European in-orbit Capture the Flag. The competition is a collaboration between the European Space Agency (ESA), D-Orbit, and the mhackeroni team. This final round will take place on site at ESA ESTEC (Netherlands) during the ESA Security for Space Systems (3S) Conference, from 4 to 6 November 2025. Finalists will compete in space-themed challenges developed by mhackeroni, including: - On-ground challenges - In-orbit challenges executed on D-Orbit’s ION Satellite Carrier, orbiting Earth in real time - King of the Hill The event is supported by the ESA Security Office and the ESA Security Cyber Centre of Excellence (SCCoE). Join the discord server: https://discord.gg/pkcCP34GPE

Ctrl+Space CTF is the first European in-orbit Capture the Flag competition. The event is a joint collaboration between the European Space Agency (ESA), D-Orbit, and the mhackeroni team, who are also responsible for creating the challenges. The competition consists of an online qualification round featuring space-themed jeopardy-style tasks, followed by an on-site final held during the Security for Space Systems (3S) Conference, taking place at ESTEC in the Netherlands from 4 to 6 November 2025. Finalists will face real-time security challenges executed directly aboard D-Orbit’s ION Satellite Carrier, orbiting Earth in real time. Ctrl+Space CTF is supported by the ESA Security Office and the ESA Security Cyber Centre of Excellence (SCCoE). Join the discord: https://discord.gg/pkcCP34GPE

CubeMastery is holding its inaugural CTF 1776 July 4 (aka 6:16pm EDT) - 2025 July 6 (aka 8:25 EDT). It will be a traditional jeopardy-style CTF, with medium-hard challenges covering web, rev, pwn, crypto, forensics, and misc categories. The CTF will be open to all teams internationally of all ages and skill levels. Infra sponsored by goo.gle/ctfsponsorship, further sponsors and prizes TBD. Site: https://cubectf.com Discord: https://discord.gg/KkVajD3JWF

?️‍♂️ Cyber Arena CTF 2025 by CSEM Get ready for Cyber Arena CTF, a thrilling 2-day cybersecurity competition hosted by CSEM from 5th July to 6th July 2025! Sharpen your skills and challenge your knowledge across multiple categories: ?️ Web Exploitation ?️ Cryptography ? Reverse Engineering ? Forensics ? OSINT ?️ Steganography

? Purpose Select top 30 women with natural offensive cybersecurity skills through practical challenge-based evaluation. LEVEL is early beginners and FEMALE only ? Format Hybrid event: Onsite at KITRI War Room (Seoul) and remote participation - https://en.kitribob.kr/ ? Organizers & Host Platform • FKCA (French Korean Cyber Alliance) – strategic coordination and leadership. • RALFKAIROS – operational lead for CyberLumen program. • Kairos (FKCA Member) – technical organizer of the event, platform deployment, and content provision via Purple Hackademy CTF infrastructure. • Global Women in Korea – community outreach and participant recruitment. ? Guest Speakers • Jay Turla (DEFCON, RootCon) • Yi-Ting Shen, Security Researcher | Conference Speaker | AI/ML Researcher | PenTest • Professor KW Lee - Korean Academic Expert in Cybersecurity • Eunkyung Lee - Security Researcher of Korea Internet & Security Agency (KISA) • Jay Turla - Principal Security Researcher (Automotive) at VicOne • Hyuna Lee - Ransomware Researcher / CTF Player at SK Shieldus • Azam Ahmad - President Advisory board at FKCA ? Partners • FKCA • RALFKAIROS • Global Women in Korea (GWK) • Root-Me PRO (platform sponsor) • BoB KITRI (host sponsor) ? Location KITRI War Room (Seoul) – up to 80 participants with PC availability, microphone, and full-day venue access. ? Timeline Saturday, June 21, 2025 Event runs from 9:00 AM to 8:00 PM KST. ? Target Participants • Female students from Korean universities • Members of the Global Women in Korea network • Beginners welcome – focus on logic, creativity, and potential. ? Participant Objectives • Verify their interest in shifting careers to offensive cybersecurity—even without prior exposure. • Learn how to generate side income via bug bounty platforms. • Understand offensive cyber career paths through expert talks. • Test

CyberKumbez is a cyber polygon competition held as part of KazHackStan, the largest cybersecurity conference in Central Asia. It's a three-day offline event simulating a realistic "smart city" infrastructure.

CyberSci is Canada's national Cyber Security Challenge for university and college students. - Think you've got an elite team of students? Come and prove it. Our winners will go on to compete against the best in the world. - Just starting out? This is the best way to learn and rise to the top. - Annual in-person events since 2016. Over 500 students so far. We run the Canadian national finals in Ottawa in the summer. - The winning team from each CyberSci regional event is invited to attend the national finals. - An all-women’s team, an all-juniors team, and an all-Indigenous team are also invited. - The 4-day on-site event has a Jeopardy and a Defense competition. - Top teams from the nationals go on to represent Canada at international events.

CyberSci is Canada's national Cyber Security Challenge for university and college students. - Think you've got an elite team of students? Come and prove it. Our winners will go on to compete against the best in the world. - Just starting out? This is the best way to learn and rise to the top. - Annual in-person events since 2016. (Online during Covid.) Over 500 students so far. Format: - Modified jeopardy style. Realistic IT environment. - Regional qualifiers are held in Nov-Dec each year. - National finals are the following July. - Winning teams represent Canada at international events in the Fall. For Regionals (qualifiers): We do hacking in the morning, interviews in the afternoon, and job offers by supper (for intern/summer/coop jobs). - Full-time job offers take a few more days. - Students register their team through their school instructor or computer club. Max 2 teams per school. For nationals: Participants will be the winning team from each regional/qualifier - PLUS one all-juniors (19 and under) - AND one all-women team (chosen from participants at the Regionals). Two-day event.

Monthly Paris chapter meetup of DEF CON Groups. Beers, lightning talks and CTF write-ups in a relaxed bar setting. Open to anyone, no badge required.

DEADFACE CTF 2025 is a free, online, jeopardy-style Capture the Flag competition that immerses players in the ongoing battle against the fictional hacker group DEADFACE. Featuring challenges across cryptography, exploitation, forensics, reversing, web, OSINT, and more, the event combines technical problem-solving with a narrative-driven storyline through the GhostTown forum. Hosted by the nonprofit Cyber Hacktics, DEADFACE CTF attracts thousands of participants worldwide who want to sharpen their cybersecurity skills, collaborate in teams, and experience a unique story-infused competition. We are proud to recognize HighViz Security as our sponsor, supporting this year’s event and helping us continue to grow the global cybersecurity community.

33rd edition of DEF CON, held in August 2025 at the Las Vegas Convention Center. Headline themes included AI red-teaming, automotive ECUs and post-quantum crypto.

The world's largest hacker convention. Multiple talk tracks, dozens of villages (Car Hacking, ICS, Bio-Hacking, AI, …), the DEF CON CTF Finals, badge hacking and an irreverent culture you have to experience to understand.

Qualifier for the DEF CON 32 finals (Las Vegas). Hosted by the Nautilus Institute.

Qualifier for DEF CON 33 finals, organized by the Nautilus Institute.

Attack-defense final between the 12 teams that qualified through Nautilus Institute's quals. Held on the DEF CON main floor over three full game days.

Duration: Each CTF lasts 4 hours. SIEM Options: Choose between Splunk and Elastic for your SIEM tool. Communication: Join our DFIR Labs CTF Discord Server for support and real-time updates. Cases: You will receive access to 1 detailed intrusion cases 1 hour before the start of the CTF. Cases include network and endpoint logs as well as Sigma and YARA hits. Questions: Complete 20+ questions within the 4-hour timeframe. Access: All you need is a web browser. Support: Live support on Discord. Winners: Top 3 players will receive a discount on swag, as well as names in the CTF winners page.

Duration: Each CTF lasts 4 hours. SIEM Options: Choose between Splunk and Elastic for your SIEM tool. Communication: Join our DFIR Labs CTF Discord Server for support and real-time updates. Cases: You will receive access to 1 detailed intrusion case 1 hour before the start of the CTF. Cases include network and endpoint logs as well as Sigma and YARA hits. Questions: Complete 20+ questions within the 4-hour timeframe. Access: All you need is a web browser. Support: Live support on Discord.

The 18 best junior, and 18 best German senior participants as well as the 6 best DACH of the https://ctftime.org/event/2588/ are competing together with the best DACH Teams of the following events: https://ctftime.org/event/2351/, https://ctftime.org/event/2402/, https://ctftime.org/event/2490/ and https://ctftime.org/event/2438/

DIVER OSINT CTF is the real-world oriented OSINT CTF. We provide country/region-neutral OSINT challenges. Challenges will be available in English and Japanese. Anyone is welcome to join. Discord: https://discord.gg/k9BmnDQxNV Twitter: https://x.com/DIVER_OSINT_CTF

DeadSec CTF 2025 is an online jeopardy-style CTF organized by DeadSec Team. ## Category There will be challenges with a wide range of difficulty mainly from cryptography, reverse, pwn, web, misc... ## Sponsor Infra sponsored by goo.gle/ctfsponsorship Offsec (https://www.offsec.com/) The winner of DeadSec CTF will qualify for the MaltaCTF 2025 Finals in Valletta, Malta.

Mark Your Calendars! The DefCamp Capture the Flag (D-CTF) Qualification Phase is Locked and Loaded for 2025! Get ready to dive into the most electrifying and audacious security CTF competition in Central and Eastern Europe—DefCamp Capture The Flag (D-CTF)! This is where the sharpest hackers and IT masterminds come together to push their skills to the limit, battling it out with top CTF teams from around the globe. The mission? Secure a spot in the elite top 10 and ultimately conquer the D-CTF competition—or go down fighting! Since 2011, DefCamp Capture the Flag has been the ultimate battleground for over 10,000 players. This annual, multi-stage event is open to all, but remember one crucial rule—hack or be hacked! Event Highlights Brace yourselves for an adrenaline-packed adventure with around 10 beginner-friendly challenges and 15 more difficult tasks that will test even the most seasoned players. Format: Jeopardy Play Format: Team-only Genres: Crypto, Pwning, Reversing, Web, Forensics, Miscellaneous… Language: English Access: Open / Free for everyone Difficulty: Entry Level - Easy - Medium - Hard - Insane The Challenge Awaits Tackle a variety of challenges across multiple categories. Exploit system weaknesses, follow cryptic hints, and uncover hidden secrets. Each challenge holds a unique flag in the format CTF{sha256 random message}. Capture it, submit it on our platform, and rack up your points. CTF competitions are a thrilling mix of puzzles and challenges, including reverse-engineering, memory corruption, cryptography, web tech, and more. Solve them, capture the flag, and climb the leaderboard to victory! Organizers & Partners This epic event is brought to you by the Cyber Security Research Center from Romania (Asociatia Centrul de Cercetare in Securitate Informatica din Romania) under the banner of DefCamp, Romania's largest an

Qualifier run by DiceGang — jeopardy across web, pwn, crypto, rev, and misc.

DiceGang qualifier for the 2026 season.

DownUnderCTF is the largest online Australia and Aotearoa (NZ) run Capture The Flag (CTF) competition. This CTF aims to up-skill the next generation of Cyber Security Professionals and to grow the CTF community in the AUNZ region. DownUnderCTF is a completely free online event open to all participants around the world. Prize eligibility is restricted to Australian and Aotearoa (NZ) Secondary or Tertiary school students to encourage collaboration and healthy competitive spirit between the nations whilst also promoting cybersecurity skills to students. With over 4600+ players and 2100+ teams in 2024 from complete beginners to seasoned CTF veterans, our diverse community is strong and we hope you can join us for 2025!

This online open-to-all CTF is the qualifier for the onsite CTF only open for European students. This will be the 10th edition of the ECW, an European convention about cybersecurity and AI. More info : https://www.european-cyber-week.eu/en Wishing you a pleasant day, come and enjoy our challenges. Sponsors : Astek France Cyber Maritime Airbus Pôle d'excellence cyber, Neverhack, Amossys, CyberCniFR, DGA, ESNA, Houko Formation, Université de Limoges, MISC

The 9th installation of the epic ENOWARS trilogy! More details on our landing page ENOWARS's top-ranked DACH team will also secure a spot at the 2026 DHM. The DHM (Deutsche Hacking Meisterschaft) is a 6-person team competition focused on fostering the best cybersecurity talent from across Germany. The qualification process for the DHM is split into two paths: half of the participants earn their place through the CSCG (Cyber Security Challenge Germany), a two-month individual competition, while the other half qualify through team-based events like this one. The winning DACH team should contact dhm@nfits.de to confirm their qualification and receive further instructions on how to participate.

EnigmaXplore will be a cyber security competition- Jeopardy Style, for participants to show their skills in various areas of computing and solve real-life security challenges. Guidelines: It’s a 12 hr online live time event, having challenges from different categories like Reverse Engineering, LLMs, OSINT, Blockchain, Web Exploitation, Cryptography etc. Hosted on CTFd platform. Each category would have at least 2-3 challenges of difficulty ranging from Easy to Hard level. Problems will be visible at the start of the competition. Teams of 1-3 members are allowed. Make sure to register on Unstop to receive prizes: https://unstop.com/hackathons/enigmaxplore-tantrafiesta25-iiitn-1548975 Discord: https://discord.gg/9JBbjVRE9h

Equinor CTF is a CTF hosted by the Equinor Cyber Defence Center and is aimed at Norwegian students and security professionals. The CTF starts at November 8th 10:00 and ends at November 8th 20:00 (Europe/Oslo). The CTF is an onsite only event. Venue capacity is limited. To play you need to register at https://ctf.equinor.com. Registration will open in August

Classic online attack-defense CTF. Each team will be given a Vulnbox image to host itself and VPN access. You will run exploits against other teams, capture flags and submit them to our server.

Global gathering of CSIRTs and incident response teams. Closed sessions for FIRST members on Monday, public conference Tuesday through Friday covering threat intel sharing, IR tooling and operational coordination.

This is the third global CTF organized by employees of Blockhouse Technology Zagreb (tbtl.com). This time, under our new brand name - Fort ID (https://fortid.com/) - a privacy-first, secure, and EUDI compliant identity solution. The contest will be in the Jeopardy format, featuring all of the standard categories (web, crypto, rev, pwn, misc). We will have a wide range of challenges, from beginner-friendly ones, all the way to some spicy ones which should hopefully be interesting to seasoned players as well. For more details, please visit https://fortid.ctfd.io/ If needed, you can always contact us at ctf@tbtl.com or our Discord server (https://discord.gg/G2n2Eqxa).

Full Weak engineer CTF is a Jeopardy-style CTF competition organized by the CTF team full weak engineer(脆弱エンジニア). The event features challenges across a wide range of categories, including Web, Pwn, Reversing, Crypto, and Forensics/OSINT. It is designed to be enjoyable and engaging for both beginners and experienced players.

The GPN CTF 2025 is this year’s CTF edition organized by KITCTF. Play online or in person at the GPN. This is a student run jeopardy-style CTF with challenges from the categories crypto, pwn, reversing, web and misc (including some more exotic ones). Featuring both a range of easy challenges from each category and a majority of hard challenges it will be a great CTF for beginners and experienced players alike. Communication channels: https://discord.gg/TxPA4ZVUnm Thank you to our sponsors for supporting the CTF! * Main & Prize Sponsor: GitHub Security Lab * Writeup Sponsor: Zellic * Infrastructure Sponsor: TelemaxX Telekommunikation GmbH Learn more about our sponsors and opportunities they have: https://gpn23.ctf.kitctf.de/#sponsors

We're excited to announce GlacierCTF 2025 for its fourth edition, a 24-hour jeopardy CTF organized by LosFuzzys. You can register under: https://play.glacierctf.com/ And join our discord at: https://discord.gg/DFYnRAME23 Sponsored by: - Hex-Rays (hex-rays.com) - ISEC @ Graz University of Technology (isec.tugraz.at) Infra sponsored by goo.gle/ctfsponsorship

The Goldrush Gauntlet CTF 2025 is a Jeopardy-style Capture-The-Flag competition that has been moved online. It will take place online from 9AM June 7 - 5PM June 8, Eastern Time.

Annual jeopardy CTF run by Google's security team.

Annual jeopardy CTF run by Google's security team.

Google's annual jeopardy-style CTF. Online 48-hour qualification round; top teams advance to an invite-only hackceler8 finale at Google offices.

categories: web, pwn, crypto, reversing, misc # Feedback If you have suggestions on how we could improve for next year, please feel free to fill out the feedback form: https://forms.gle/KACEBk3rb3EUtRSx9 If you have specific feedback about a challenge, fill out the task feedback form: https://forms.gle/o8aLtWTE47uH3iqn7

Das 5. TI Capture the Flag Event der gematik am 14.11.2025. KIM & TI-M haben es geschafft – die Drahtzieher sind identifiziert und die Angriffswelle aus Kapitel II: To TI-Mfinity and Beyond wurde gestoppt. Doch die Jagd ist noch nicht vorbei: Die TI‑Ranger bündeln ihre Kräfte an einer zentralen Anlaufstelle und steigen direkt in die Telematikinfrastruktur (TI) ein. Beim TI Capture The Flag (Jeopardy Style) können im Team mit bis zu 4 Leuten Flags gesammelt werden. Auf die Gewinner des Contests warten attraktive Preise. Und sicher ist: Alle Teilnehmenden können sich auf einen spannenden und fordernden Wettbewerb in einer virtuellen Welt mit weiteren Challenges freuen. Anmeldung bis 11.11.2025 / 23:59 Uhr möglich

H7CTF returns for its second edition: a 36-hour international competition open to all teams, with no size restrictions. Teams aiming for the onsite finals at SRM University, Chennai must participate under the Onsite Bracket. While competing in the same global CTF, the following conditions apply: Teams must consist of exactly four members from the online stage onward. Performance will be tracked on a dedicated Onsite Bracket scoreboard. Only teams in this bracket will be eligible for onsite qualification. Registration through Unstop is encouraged: https://unstop.com/competitions/h7ctf-h7tex-1559470 Event Details: Dates: 18 Oct 2025, 09:00 IST – 19 Oct 2025, 21:00 IST Categories: Reverse Engineering, Pwn, DFIR, OSINT, Web Exploitation, Boot2Root, Web3, Hardware, Crypto, Miscellaneous, AI Discord: https://discord.gg/3ZaFbQRY3C Separate prizes will be awarded for the global online track and the onsite finals in India.

Hacks In Taiwan Community — Taiwan's largest hacker conference. Two days of talks in English and Mandarin covering offensive research, hardware reversing and APT analysis.

Taiwanese hacker conference's flagship jeopardy CTF.

[TBD]

Flagship jeopardy CTF from HITCON (Taiwan).

HITCON Cyber Range is one of Taiwan's benchmark challenges for Blue Teams, testing not only technical depth but also the limits of teamwork and on-the-spot reaction. Through HITCON Cyber Range, you will: Experience the most realistic cybersecurity incident response processes. Hone investigation skills to uncover the truth from subtle clues. Enhance practical defense capabilities against real-world threats. ## Organisations Advising Organisation: Administration for Digital Industries, Ministry of Digital Affairs Organisers: Association of Hackers in Taiwan (HIT) / Industrial Technology Research Institute (ITRI) ## Competition Description The HITCON Cyber Range competition will proceed in two main stages: first, the Global Online Qualifiers, followed by the On-site Finals held in Taiwan. Participating teams must pass the challenges of the Online Qualifiers to be eligible for the Finals. ## Important Dates (All times are UTC+8) Registration Deadline: June 30, 2025 (Monday) 23:59 Global Online Qualifiers: July 18, 2025 (Friday) 10:00 - 23:59 (14 hours total) Announcement of Finalists and Details: September 1, 2025 (Monday) Offline Finals & Award Ceremony: October 17, 2025 (Friday) ## Finals Qualification Rules A minimum of 10 teams are expected to advance to the Finals. Qualification slots include: - Top 5 domestic corporate teams from the Online Qualifiers. - 2 teams recommended by F-ISAC. - 3 reserved slots for international teams. - On-site Finals & Award Ceremony Venue Venue: Taipei New Horizon Building, 6F Function Room - Address: 6F, No. 88, Yanchang Road, Xinyi District, Taipei City, Taiwan ## Contact Information - If you have any questions, please feel free to contact the HITCON Cyber Range team via Email: cyberrange@hitcon.org ## Awards and Recognition I. Qualifiers Teams that meet the eligibility criteria and fully part

HITCON Cyber Range is one of Taiwan's benchmark challenges for Blue Teams, testing not only technical depth but also the limits of teamwork and on-the-spot reaction. Through HITCON Cyber Range, you will: Experience the most realistic cybersecurity incident response processes. Hone investigation skills to uncover the truth from subtle clues. Enhance practical defense capabilities against real-world threats. ## Organisations Advising Organisation: Administration for Digital Industries, Ministry of Digital Affairs Organisers: Association of Hackers in Taiwan (HIT) / Industrial Technology Research Institute (ITRI) ## Competition Description The HITCON Cyber Range competition will proceed in two main stages: first, the Global Online Qualifiers, followed by the On-site Finals held in Taiwan. Participating teams must pass the challenges of the Online Qualifiers to be eligible for the Finals. ## Important Dates (All times are UTC+8) Registration Deadline: June 30, 2025 (Monday) 23:59 Global Online Qualifiers: July 18, 2025 (Friday) 10:00 - 23:59 (14 hours total) Announcement of Finalists and Details: September 1, 2025 (Monday) Offline Finals & Award Ceremony: October 17, 2025 (Friday) ## Finals Qualification Rules A minimum of 10 teams are expected to advance to the Finals. Qualification slots include: - Top 5 domestic corporate teams from the Online Qualifiers. - 2 teams recommended by F-ISAC. - 3 reserved slots for international teams. - On-site Finals & Award Ceremony Venue Venue: Taipei New Horizon Building, 6F Function Room - Address: 6F, No. 88, Yanchang Road, Xinyi District, Taipei City, Taiwan ## Contact Information - If you have any questions, please feel free to contact the HITCON Cyber Range team via Email: cyberrange@hitcon.org ## Awards and Recognition I. Qualifiers Teams that meet the eligibility criteria and fully part

Hong Kong computer emergency response team annual CTF.

2 Very Easy, 2 Easy & 1 Medium Web Challenges The digital world has been overtaken by The Patchwork, a sprawling virtual network designed to safeguard global infrastructure. At its center lies The Architect, an AI originally created to defend the internet from vulnerabilities. But The Architect has gone rogue, exploiting critical flaws to sow breaches, chaos, and catastrophic data loss. Its relentless attacks threaten to plunge humanity into the Cyber Dark Ages, where no data, system, or network can be trusted. You are one of The Hunters. Armed with your expertise in web vulnerabilities, you must hack into high-profile institutions such as universal banking apps, healthcare systems, and global data repositories that have been compromised by The Architect. By exploiting the vulnerable systems, you can identify and mitigate flaws, dismantling The Architect’s control piece by piece.

Program : 2pm - Welcome 15h - Talks 18h - CTF 06h30 - Awards ceremony Categorie : AD / System / OSINT / Web / Pwn / Social Engineering / Lockpicking / Web3 / Forensic / MISC Tickets €25. The price includes full access to the event, evening meal from our caterer, food all night, stock of RedBull, breakfast, goodies, etc. More infos on our website !

Small, technical European conference organized by CIRCL. Four days of talks, hands-on workshops and a MISP threat-intel summit.

Hack.​lu CTF is organized by FluxFingers, the CTF team of Ruhr-University Bochum (Germany). This will be the 15th edition.

The HFCTF is only on premises at the Centre des Congrès de Québec, not online. The CTF will last 24 hours non-stop for participants and will run from Thursday 19:30EST to Friday 19:30EST. It's mandatory to purchase both a Hackfest Ticket and a HFCTF ticket to participate in the CTF (https://hackfest.ca/en/register). You must join the official Hackfest Discord server in order to participate in the CTF (link: https://discord.hackfest.ca). On the day of the event, you'll need to sign in using your Discord account to access scoreboards and CTF infrastructure. The HFCTF is a 24 hours team event, so only teams of six will be allowed. Contestants that are not in a team or that have a team with fewer than six members will be mixed randomly to create tables of six people. You can ask on the Hackfest Discord if you have any questions about this. Teams are not managed in Eventbrite, so you can buy your tickets as you wish. Teams will be formed at the beginning of the event where you will create your team and declare a captain when you log in to the CTFd. More information will be given on the Discord. Further details will also be on the Hackfest Discord. A dedicated channel for the HFCTF 2025 will be created with all the necessary information and support.

Halloween's coming up, and so is a spooky, brain-bending challenge! ?? Get ready for Hackloween 2025, a capture-the-flag (CTF) competition with a creepy twist. SEC Playground is hosting this thrilling event where you'll face challenging puzzles and hunt for digital flags—all with a Halloween theme. Grab your team, sharpen your skills, and get ready for a cyber showdown. Awesome prizes are up for grabs! ?✨

The HackornCTF 2025 Quals, powered by Hackor[n] and supported by SecPen Labs, is a free and open-to-all Capture The Flag competition designed to engage the cybersecurity community across India and beyond. The event emphasizes learning, collaboration, and real-world skills, catering to both beginners and experienced players. Sponsors & Supporters: + SecPen Labs – Knowledge and infrastructure partner + BSides Noida – Host community platform

Haix‑la‑Chapelle 2025 is a online Jeopardy-style CTF organized for the first time by Pwn‑la‑Chapelle and friends! It will feature challenges in: Web, Reverse Engineering, Cryptography, Binary Exploitation, OSINT, and more. There should be some easy challenges and difficult ones for advanced players! Registrations are now open! Supported by: - Research Group ITSec @ RWTH Aachen University (https://www.itsec.rwth-aachen.de/cms/~ehnyx/itsec/) Sponsored by: - RedTeam Pentesting (https://redteam-pentesting.de/) - Binary Ninja (https://binary.ninja/) Infra sponsored by goo.gle/ctfsponsorship

Eight edition of the Hardware CTF for <a href="https://hardwear.io/">Hardwear.io</a> NL 2025. We've got plenty of challenges related to various themes such as PCB reversing, Microsoldering, BLE, RFID, MCU, and much more. We provide the hardware hacking tools you might need (soldering iron,...) as well as guidance on how to use them. Challenges creation and CTF organization by Quarkslab and Ledger teams. Prizes sponsored by <a href="https://hardwear.io/">Hardwear.io</a>.

Something is brewing up… and it smells like… a CTF! A strange stir echoes in the shadows… a terrifying scream in the far distance… We are thrilled (and slightly scared) to announce our second official OSINT CTF – Halloween Edition! For 30 haunting hours, your OSINT tools and investigative skills will be tested to the limit. Get your squad ready: team of two participants will work best to survive the challenges released by the awakened pumpkin. Though if you dare, you can also ride solo… Team registration opens on October 28th – stay sharp, stay together… and maybe you’ll make it through the night. Further instructions can be found on https://osintswitzerland.ch/events/haunted-pumpkin-ctf

HeroCTF is an online cybersecurity competition for beginners and advanced players. Join us on Discord https://discord.gg/mgk9bv7

Event Overview Welcome to HTB’s first-ever Blue CTF! This gauntlet of Sherlock-style challenges leads you through a case that has yet to be solved! Joining this event will allow you to investigate a range of scenarios: Threat Intelligence SOC DFIR Malware Reversing With a team of 5, use your collective wit to dive into this forensic mystery and resolve an issue plaguing the city of Cogwork-1. Use your ace intellect to solve the crimes in Cogwork-1 Consider this our official debrief. Holmes left some vague context (as he does) before heading out into the field. Here’s what we know: We are getting strange readings from around the city; there were some targeted attacks on local businesses that seemed off. Who was chosen and the type of attack piqued Holmes’ interest, so he set out ahead of us. Odd though… he was muttering about something that had happened a while back, and he expressed distress about a personal AI he developed named WATSON. See, WATSON was his collaborative ally in his attempts to curb the crime happening around the city. However, some time ago, a catastrophic false-alert event caused by WATSON triggered a year-long manhunt for a breach that never existed. We were chasing ghosts. Reputations ruined. Careers ended. The entire city was paralyzed over a phantom that was in our own backyard. The event known as NULLINC caused Holmes to shut down his creation, his friend. So, we are just as confused about why he’d mention WATSON now, but you never can get a read on that man. Head out into the field and assist him in finding out what’s going on. We are counting on your detectives.

IERAE CTF is the CTF organized by ierae, the CTF team of GMO Cybersecurity by Ierae, Inc. GMO Cybersecurity by Ierae, Inc. is a Japanese security company with many CTF players. We have been helped by and grown with those CTF players, and now we want to help energize the community.

ImaginaryCTF 2025 will now take place from September 5-7. ImaginaryCTF 2025 is a cybersecurity CTF competition run by ImaginaryCTF with a variety of challenges for all skill levels, running from September 5-7. Teams will be challenged to discover vulnerabilities in websites, crack codes, and recover information through challenges in cryptography, binary exploitation, web exploitation, forensics, reversing, and more. We hope that you will learn something new from our challenges!

This CTF has been designed keeping in with the theme of Mission Impossible 8: Final Reckoning and is paying tribute to the Mission Impossible franchise.

The Red Team Association is hosting an attack/defend CTF qualifier event on September 27th from 12 PM to 8 PM PST. Each team will receive an identical vulnerable system to authenticate to and secure. Teams must identify security vulnerabilities in their assigned system, then use their knowledge to exploit the same vulnerabilities in other teams' systems. Date: September 27th, 2025 Time: 12 PM - 8 PM PST (8 hours) Registration: Open until the event begins Team Size: No limits Difficulty: Beginner/Intermediate Technical Requirements: SSH client only How It Works: Teams receive SSH credentials (key and IP address) to access their assigned vulnerable system. Flags rotate every minute, allowing teams to submit flags continuously for points. Teams are penalized for taking their services offline, so maintaining system availability while securing vulnerabilities is crucial. Qualification: The top 50 teams will be invited to compete in the multi-day InfiniteCTF Main Event on November 7th-8th. The Main Event is online and features significantly more systems and challenges ranging from beginner to advanced difficulty. The first place team will receive 5 Flipper Zeros, thanks to our sponsor Casco (https://casco.com). For questions, contact us on LinkedIn!

Welcome to Infobahn CTF, our team’s first-ever Capture The Flag event! It’s a fun competition for everyone, whether you’re new or experienced. We’ve got challenges in Web, Reverse Engineering, Cryptography, Binary Exploitation, Jail, and more. Plus, a Beginner category to help newbies learn. Join us, test your skills, and meet others! Join our discord: https://2025.infobahnc.tf/discord A huge thanks to our Sponsors: - Google Cloud - OffSec - OtterSec - RET2 Systems - Cybersharing - Rapid Risk Radar Infra sponsored by goo.gle/ctfsponsorship

? Join India’s Premier Virtual Cyber Security Hackathon! ? We are excited to announce the return of the Infosec University Hackathon 2025, hosted by Synchrony in collaboration with the Cybersecurity Centre of Excellence (CCoE) Hyderabad for all college students in India. As cyber threats evolve rapidly, the future demands skilled defenders who can think creatively and act decisively. At Synchrony, we are dedicated to empowering the next generation of cybersecurity professionals — and this hackathon is your gateway to step into that future. ? Whether you're passionate about threat hunting, cryptography, digital forensics, or building secure technology — this is your arena to prove your skills, compete with the best, and win incredible rewards ? including a chance to intern with Synchrony! Who can participate? Open to all students pursuing Bachelor’s, Diploma, and Master’s degrees who are eager to build and test their cybersecurity skills. Take the leap and become a part of India’s strongest cyber talent force! ? Register Now: https://syfinfosechackathon.info/ ? Last Date to Register: November 21, 2025 ? Qualifier Round: November 23, 2025 ? Grand Finale: November 29 & 30, 2025 Let’s secure the future together! ?✨

Europe's flagship information security exhibition and conference. Three days of vendor keynotes, technical workshops and an enormous exhibitor floor at ExCeL London.

Casual CTF for beginner to intermediate levels. Good if you expect the Google one this weekend will be a bit much. Challenges in the category of: - Reversing - Web exploitation - Forensics - Cryptography

The second edition of the International Iran Tech Olympics in the field of security will be held in the preliminary round in September. The top three teams from the preliminary competition will receive prizes and advance to the final stage alongside the top 20 teams from Iran and abroad. This final round will take place in person in Iran in October, featuring competitions in three categories: Attack and Defense, Hardware, and Pwny Racing.

Please note that this event is for individual participation only!

Junior.Crypt.2025 CTF — an open cybersecurity competition for university students, college and school students, and anyone interested. This is a 48-hour online event. We hope all participants will be able to fully apply their skills and have a great time. The CTF is organized by students from the Department of System Programming and Computer Security at Yanka Kupala State University of Grodno, Grodno, Belarus. Team participation is required, with teams consisting of 1-4 members. Challenges will cover various categories—beginner, cryptography, forensics, miscellaneous, OSINT, ppc, pwn, rev, and web. The official languages of the tournament are Russian and English. However, you can still participate even if you don’t speak either. We will do our best to ensure that every task is understandable with machine translation. Additionally, throughout the competition, we will introduce participants to the extraordinary beauty of our country—the Republic of Belarus.

K17 CTF is a 48-hour online Jeopardy CTF with a mix of beginner-friendly and hard challenges, hosted by UNSW's Security Society. Registration: https://ctf.secso.cc/ Sponsors: Hack The Box Join our discord for rules and announcements related to the CTF: https://discord.gg/QeCGUhbjXx

<strong>Kuban CTF</strong> is a team competition where you and up to four teammates can challenge your cybersecurity skills. You'll face creative and engaging tasks that test your challenge-solving abilities. The top 10 teams from the qualification round will advance to the semifinals, and the top 5 teams from the semifinals will move on to the finals! At the VI International Information Security Conference Kuban CSC 2025, held in the Sirius federal territory. The semifinals take place on October 23, followed by an exciting <strong>Attack-Defense final on October 24.</strong> Compete by attacking, defending, and strategizing to prove your expertise! <strong>Finalists enjoy:</strong> • Free accommodation • Meals provided • Fun social events Don’t miss the chance to become a champion — register now via the link!

L3HCTF 2025 is a Jeopardy-style Online Capture The Flag Competition presented by Team L3H_Sec. The contest is open to all participants around the world. Teams can compete from any location. No restriction on the number of participants of any team. The Champion Team of L3HCTF 2025 will be invited to The Finals of the 9th Edition of XCTF(the location/date is subject to change, qualified teams will be informed when the Finals location/date is confirmed). Other teams can also get the cumulative points to compete for other slots in The Finals of the 9th Edition of XCTF.

Beginner-friendly CTF. Challenge difficulty will range from beginner to expert. 10 categories: crypto, web, rev, pwn, forensics, osint, mobile, hardware/rf, hash cracking, and misc. We have created 60+ awesome challenges for you to enjoy with lots of prizes. Gather your hacking crew and be prepared to battle it out in the BEST CTF competition of the year! Discord: https://discord.gg/wjSVdt3a7G Infra sponsored by goo.gle/ctfsponsorship We'd like to sincerely thank all our sponsors for their generous support and contribution to the prize pool: Zellic OtterSec haxo.games HackTheBox TryHackMe Altered Security Google (Infra) RET2 Systems CTFguide OffSec Deloitte hex-rays Trail of Bits

LINE CTF 2025 is a one-day online jeopardy-style competition hosted by LY Corp's security team.

Qualifications for fourth edition of LakeCTF

Layer7, the security club at Sunrin Internet High School, is celebrating 15 years of running CTFs and offensive security research. We are back this year with a special anniversary CTF — individual participants only! Registration Period: October 22, 2025 ~ November 12, 2025 (KTC) Sponsors: Dreamhack, HSPACE, ENKI Whitehat Prize Pool: ₩3,000,000 + merchandise Participation: Individual registration only (no teams) Format: Jeopardy-style Register: https://ctf.layer7.kr Additional Information: Please check the registration page for full details and schedule. Don’t miss the registration deadline! Looking forward to seeing you in the competition. Contact: ctf@layer7.kr

Lexington Informatics Tournament CTF 2025 is a Jeopardy-style, beginner-friendly online CTF that's open to everyone. It is hosted by members of the LexMACS club from Lexington High School with the help of some amazing guest writers. You may form teams of up to 3 contestants! Sponsors: Infra sponsored by goo.gle/ctfsponsorship Non-Trivial Algoverse SPARC AoPS Texas Instruments RSM OtterSec X-Camp Trail of Bits Wolfram MIT Beaver Works Interview Cake .xyz Zulip For more information, visit our website at https://lit.lhsmathcs.org/ You can also join our Discord server https://discord.gg/k6yzFdZ

Qualifying tournament before the final competition M*CTF 2025 among school of Moscow city. Any team can take part, the 12 strongest teams of various Moscow schools pass to the final.

Qualifying tournament before the final competition M*CTF among universities of Moscow city. Any team can take part, the 10 strongest teams of various Moscow universities pass to the final.

MaltaCTF is an international cybersecurity event organized by Friendly Maltese Citizens. The CTF features online preliminary rounds throughout 2025, with finals taking place alongside the MaltaCTF Conference held on-site in Valletta, Malta. site: https://2025.ctf.mt discord: https://discord.gg/skM2YU8jC4 Proudly sponsored by: - Zellic - Ottersec Infra sponsored by goo.gle/ctfsponsorship

MaltaCTF is an international cybersecurity event organized by Friendly Maltese Citizens. The CTF features online preliminary rounds throughout 2025, with finals taking place alongside the MaltaCTF Conference held on-site in Valletta, Malta. Site: https://quals.2025.ctf.mt Discord: https://discord.gg/skM2YU8jC4 Proudly sponsored by: - Zellic - Ottersec Infra sponsored by goo.gle/ctfsponsorship

A monthly CTF hosted by MetaCTF and supported by Antisyphon Training, TCM Security, and Simply Cyber Academy. There will be 5 challenges, and you will have 2 hours to solve as many as you can. Participation is individual and free to enter.

A monthly CTF hosted by MetaCTF and supported by Antisyphon Training, TCM Security, and Simply Cyber Academy. There will be 5+ challenges, and you will have 2 hours to solve as many as you can. Participation is individual and free to enter.

Organisé par les étudiants de l'ESGI, le MindBreak c'est : ▶ Une compétition CTF la nuit par équipe de 1 à 4 ; ▶19h to 6h ▶ Formulaire d'inscription https://framaforms.org/inscription-pour-le-mindbreak-ctf-2025-sur-place-uniquement-1746438856 ⚠️CTF en présentiel uniquement, 242 rue du faubourg st antoine, 75012 Merci à nos sponsors et soutient - Hack The Box - I-Tracing - ESGI - BDE Sigma

N1CTF is a jeopardy style CTF held by team Nu1L Team.

Online jeopardy CTF (April 2026).

Join us for the first edition of jeopardy-style CTF organized by the Norske Nøkkelsnikere CTF team! There will be challenges in various categories such as web, misc, crypto, blockchain, devsecoops, rev, pwn, community-made and more! Everyone is welcome to join the CTF — beginners, students, intermediate players, and experts. Discord: https://discord.gg/9AZr3WKrjG Sponsors: OtterSec, EPT, River Security For onsite locations, please visit our discord server.

⚠️⚠️⚠️ Attention! The event time has been updated to: Sat, 05 July 2025, 08:00 – Mon, 07 July 2025, 20:00 (UTC+8) ⚠️⚠️⚠️ Welcome to No Hack No CTF 2025, organized by ICEDTEA, a passionate cybersecurity team from Taiwan dedicated to fostering learning and competition among cybersecurity enthusiasts worldwide. This event offers an exciting opportunity for participants to challenge themselves in a fair and competitive environment. Join our event for a thrilling 60-hour experience filled with challenges and learning opportunities. Whether you're a seasoned professional or new to cybersecurity, No Hack No CTF 2025 is the perfect place to test your skills and connect with the global cybersecurity community. Join our Discord server for assistance: https://discord.gg/7nvSsaUAQT Contact us at : nhnc@ic3dt3a.org

ATTENTION: CTF runs from 4th September 2025 08:30 AM UTC (10:30 AM CEST) to 5th September 2025 11:00 AM UTC (01:00 PM CEST) =========================== Nullcon Berlin HackIM 2025 CTF We welcome you to yet another installation of the Nullcon CTF. This is a primarily a conference CTF for Nullcon Berlin 2025, but online participation is also possible. There MIGHT/WILL be challenges that are only available on-site.

OWASP's annual European application security conference. Two days of training followed by three days of talks across AppSec engineering, threat modeling, secure SDLC and emerging AI/LLM security topics.

Free monthly meetup of the OWASP New York City chapter. Two short talks on application security followed by pizza and discussion.

OmniCTF is an on-site, Jeopardy-style competition only in Constanța. Expect a balanced mix of Web, Crypto, Forensics, Reverse, Hardware and Misc/OSINT challenges aimed at Easy → Medium difficulty (with a few being hard). Bring a laptop and your favorite tools. Who Can Join Middle School & High School Students (<25 yrs) Competition is individual (no teams). More Informations @ https://omnictf.com Sponsored By: - Spectrum Constanta - DeadOverflow(https://www.youtube.com/@deadoverflow) - CAIDO(https://caido.io/) - NOXYS (https://noxysgames.com/)

PECAN+ is an Australian Capture The Flag (CTF) style cyber security competition for high school-aged competitors (yr 10-12). PECAN+ CTF is led by Edith Cowan University's School of Science as a collaborative initiative that brings together higher education institutions, cyber security industry, government, teachers and students around the aim of raising cyber security awareness, skills and aspirations. Thank you to our sponsors for their generous support of the 2025 competition: https://pecanplus.org/?page=sponsors

PH03N1X V1P3R N0V4 CTF a new ctf in town. A CTF with a twist. Because its aim is to teach rather than focus on competition side.The approach we’ll utilize is the following: during the 3 day competition at multiple points we’ll freeze the scoreboard, and well split the 40 teams in 2, so 20/20. Than say group A will have to teach or explain to group b a certain challenge randomly chosen. Now if group B manages to solve it they are still allowed to keep competing. If they don’t manage to solve it they won’t be allowed to continue the competition. This method encourages peer based learning. A physical presence unique event not only on the way the ctf takes place, but unique cause it's only one stage so no qualifiers. Event will contain embedded pwn(arduino pwn+ re),space hacking(kudos to EthosLabsLLC), mainframe hacking(special thanks to soldier of fortran), bomb defusal, normal pwn, web, crypto ,forensics, powerpc,ic(cmos) revese engineering, nday development, docker escape, and car hacking, ics&scada(shoutout i0.rs group), browser pwn. Event will be from 29-31 October, physically in Timisoara, Romania. Currently looking for sponsors, current sponsor: @fuzzysec prize sponsors: caido, metactf, cyberwarfare labs media sponsors&partners: i0.rs, uav.ro, cyberedu, defcon Cluj,calpyso heavy industries challenge sponsors: i0.rs, ethos labs, Alex Hornyai@ecsc team hungary, soldier of fortran,0xmard Please note that the dates for the event change from 29-31 to 28-30 Should you wish to participate in the event, please fill the form(https://docs.google.com/forms/d/e/1FAIpQLSdKO7QZKdwNRuakt7WoYnb6Fzq1Jxrx6fI8r8gJtdXDFkJRRA/viewform?usp=dialog) and join the discord or visit pwnctf.ro. Please fill it only if you consider attending it very seriously ! If any problems should arise while filling in the form please reach @f00fc7c800 on twitter!

PH03N1X V1P3R N0V4 CTF a new ctf in town. A CTF with a twist. Because its aim is to teach rather than focus on competition side.The approach we’ll utilize is the following: during the 3 day competition at multiple points we’ll freeze the scoreboard, and well split the 40 teams in 2, so 20/20. Than say group A will have to teach or explain to group b a certain challenge randomly chosen. Now if group B manages to solve it they are still allowed to keep competing. If they don’t manage to solve it they won’t be allowed to continue the competition. This method encourages peer based learning. A physical presence unique event not only on the way the ctf takes place, but unique cause it's only one stage so no qualifiers. Event will contain embedded pwn(arduino pwn+ re),space hacking(kudos to EthosLabsLLC), mainframe hacking(special thanks to soldier of fortran), bomb defusal, normal pwn, web, crypto ,forensics, powerpc,ic(cmos) revese engineering, nday development, docker escape, and car hacking, ics&scada(shoutout i0.rs group), browser pwn. Event will be from 29-31 October, physically in Timisoara, Romania. Currently looking for sponsors, current sponsor: @fuzzysec prize sponsors: caido, metactf, cyberwarfare labs media sponsors&partners: i0.rs, uav.ro, cyberedu, defcon Cluj,calpyso heavy industries challenge sponsors: i0.rs, ethos labs, Alex Hornyai@ecsc team hungary, soldier of fortran,0xmard Should you wish to participate in the event, please fill the form(https://docs.google.com/forms/d/e/1FAIpQLSdKO7QZKdwNRuakt7WoYnb6Fzq1Jxrx6fI8r8gJtdXDFkJRRA/viewform?usp=dialog) and join the discord . Please fill it only if you consider attending it very seriously ! If any problems should arise while filling in the form please reach @f00fc7c800 on twitter!

Power Of Community – POC CTF 2025 The competition will take place over two days, on November 13 and 14 Four Seasons Hotel in Seoul, Korea (Onsite). - Day 1 Registration: 8:00 – 10:00 AM (Seoul Time) Competition: 10:00 – 6:00 PM (Seoul Time) - Day 2 Competition: 10:00 – 3:00 PM (Seoul Time)

Power Of Community – POC CTF 2025 An individual competition where participants compete to solve challenges and earn points. *Qualification Round:* - Date: 24 hours from 12 Oct 2025, 10:00 GMT (01:00 PM KSA Time) - Location: Online *Final Competition:* - Date: 13-14 Nov 2025 during Power Of Community conference - Location: On-Site - Four Seasons Hotel in Seoul, Korea

**The Time listed on CTF Time is incorrect! PCTF will start at 6:00 PM EST November 21 and end at 6:00 PM EST November 23rd!** PatriotCTF is an online jeopardy-style CTF hosted by George Mason University's Competitive Cyber Club. All are welcome to participate, including students and security professionals. Challenges will range from beginner to expert, so there will be challenges for everyone of all skill levels. Challenges include: Web, Reverse Engineering, PWN, Cryptography, Forensics, OSINT, & Misc. Website - https://competitivecyber.club/patriotctf/ Discord - https://discord.gg/Z8pA43vQcW

Information Security Systems Programming Championship Perm CTF | October 11, 2025 Who can participate: Citizens of the Russian Federation over the age of 14 (schoolchildren, students, established specialists). Tasks: Capture the Flag, search for vulnerabilities in programs and websites, computer forensics, open source network intelligence, reverse engineering, virtual machine hacking, cryptography. Format: Team competition (2-5 people per team). Registration: until October 10, 2025 (the application is submitted by both the captain and the team members). Special feature: Registration of teams for the face-to-face tour lasts up to a set of 20 teams / 100 participants, then a reserve is formed in case of non-attendance. Final round (face-to-face): October 11, 2025 for the first 20 teams/100 first registered participants. Final Round (online): October 11, 2025 for participants who have specially registered through the "Out of competition" form. Requirement: Competitions are held on participants' personal laptops. The use of AI in solving problems is allowed. Categories of tasks: web, cryptography, reverse engineering, forensics, infra, miscellaneous(physics), steganography Sponsors: Morion Digital, R-X Team (Ertelecom Holding), Dr. WEB, Yandex Cloud, VK, DNS meetups for beginners: 4.10.2025 offline 16:00 427 cabinet (tell us about the events. Categories. What is CTF? Examples of tasks) 5.10.2025 14:00 online ( web category in detail. Reverse the android app. Few tasks) 7.10.2025 18:00 online (investigation of incidents via wireshark examples of tasks with spbguti. Cryptography for CTF links: https://vk.com/itedunetwork (vk group sponsor) https://vk.com/wall-178980173_4734 (information post for the start of the event) https://vk.com/wall-178980173_4765 (information post of the end of the event) https://t.me/permctf (telegram group event)

Long-running CMU jeopardy CTF hosted by Plaid Parliament of Pwning (PPP).

Annual jeopardy CTF hosted by CMU's Plaid Parliament of Pwning (PPP).

The Platypwn 2025 is an online Jeopardy CTF which offers easy challenges for beginners, but also medium and difficult challenges for advanced players. We are proud to announce that Platypwn 2025 will be a DHM qualifier! The best not-yet-qualified team from the DACH region qualifies for the "Deutsche Hacking Meisterschaft" (https://hacking-meisterschaft.de/). See https://platypwnies.de/events/platypwn for further details. Infra sponsored by goo.gle/ctfsponsorship

The 2025 contest consists of 80 challenges over 8 weeks, released in weekly waves of 10 challenges per week! The context begins September 14th, 2025 and runs until November 16th, 2025. This year, the contest consist sof challenges in a variety of cybersecurity skills with difficulty levels ranging from very easy to extremely difficult! This contest is designed for beginners and learners to the world of CTFs and cybersecurity, so even if you've never done a CTF before, this contest is for you!

Zero Day Initiative's contest targeting consumer devices: phones, printers, NAS, routers and smart speakers. Cash payouts for full exploit chains demonstrated live.

PwnSec is proud to present its 2nd edition CTF. Tune in for top jeopardy madness built by our team featuring web, crypto, reverse engineering, binary exploitation, cloud, forensics, misc, mobile, and more! Thanks to our sponsors: CTFAE, Hack the Box, Altered Security, PwnedLabs, Cybersharing and Zellic for supporting the community and bringing you an awesome event! Discord: https://discord.gg/4a59DmNVDK

The event aims to establish an international platform for students and enthusiasts to demonstrate their skills in cybersecurity, artificial intelligence, and problem-solving through a CTF competition. It is designed to increase participants' practical experience with security challenges and inspire them to pursue careers in cybersecurity and ethical hacking. CTF Domains The competition will feature Jeopardy-style CTF challenges across a variety of domains, including: Web Security Cryptography Forensics OSINT Reverse Engineering Artificial Intelligence Security (including LLM Jailbreaking and Reversing a Pickle Model) Blockchain MISC (Miscellaneous)

QnQSec CTF 2025 is an online jeopardy-style Capture The Flag competition organized by QnQSec. It features challenges across a variety of categories, including Reverse, Pwn, Cryptography, Web, Forensics, OSINT, Web3, Misc, and more. With 50+ challenges and a total prize pool of $20,000, participants can expect a fun, competitive, and educational experience. Team Size : Unlimted Registration opens on 10/14 Discord: https://discord.gg/q5UNp7kgWm Sponsored by: Zellic Ottersec Offsec Google Altered Security Caido Trainsec Letsdefend ApiSec University zSecurity Rapid Risk Radar CyberSharing Parrot-CTFs Hackviser XYZ Special thanks to all our sponsors for making this event possible. Infra sponsored by goo.gle/ctfsponsorship

R3CTF 2025 is a online jeopardy-style CTF organized by r3kapig. Categories: Pwn, Web, Crypto, Reverse, Blockchain, Misc. Forensics and etc.... Sponsors: Gold sponsors: OtterSec (https://osec.io/) && Offside Labs (https://offside.io/) (Listed in no particular order) Infra sponsored by goo.gle/ctfsponsorship Support channel -> https://discord.gg/zU64ekBsgA

RCTF 2025 is a Jeopardy-style Online Capture The Flag Competition presented by ROIS（Researcher Of Information Security）. The contest is opened to all participants around the world. Teams can compete from any location. No restriction on the number of participants of any team. The Champion Team of RCTF 2025 will be invited to The Finals of the 10th Edition of XCTF(the location/date subject to change, qualified teams will be informed when the Finals location/date is confirmed). Other teams can also get the cumulative points to compete for other slots to The Finals of the 10th Edition of XCTF. Platform: https://rctf2025.xctf.org.cn/ discord: https://discord.gg/hq4m3KrVfG QQ Group: 935041519

RSTCON 2025 CTF is an on-site/online competition for RSTCON, which is an annual technical security and hacking conference hosted in Savannah, GA, USA. RSTCON focuses on cutting-edge research, exploitation, and tradecraft in the logistics, energy, and manufacturing industries, as well as the sensors, systems, and architectures they rely on. RSTCON is home to the curious and those passionate about software and hardware security. Thanks to our CTF Host and Sponsor MetaCTF (https://metactf.com)! Discord: https://discord.gg/va7PvCRN9g

RootCipher is a two-day online cybersecurity event organized by THUNDERCIPHER in collaboration with ROOTX. Day 1 (8 Nov 2025) is a practical workshop day with industry speakers — Raj Kumar Mullapudi and Sandip Banerjee — delivering focused sessions on real-world offensive & defensive techniques. Day 2 (9 Nov 2025) is an online Jeopardy-style Capture The Flag (CTF) that tests web, crypto, forensics, reversing, and pwn skills across a range of difficulty levels. Who should join Students, hobbyists, and professionals who want practical, hands-on experience. Beginners looking for approachable challenges and guided learning. Intermediate and advanced players seeking competitive puzzles and real-world scenarios. Format & rules (summary) Format: Online — Jeopardy-style CTF. Duration: Single competitive day on 9 Nov 2025 (exact start time announced on the registration page in IST). Team size: Individual or teams (recommended max: 4 members). Scoring: Standard dynamic scoring with hints and progressive solves. No disruptive attacks; fair-play required. Detailed rulebook will be available before the CTF start. Registration required: All participants must register via the official form (link below). Participation is free unless otherwise stated. Prizes & recognition Top prizes (including: CRTP voucher for 1st place) and digital certificates for top finishers. Additional swag and community recognitions to be announced. Important links & contact Registration: https://forms.thundercipher.tech/form/949b7b32-ff49-400e-9194-a91a5deeb910 Organizer: THUNDERCIPHER — https://thundercipher.tech (official pages and socials) Contact / Questions: organiser email or Discord listed on registration page. Why attend RootCipher blends instructor-led workshops with an accessible, well-structured Jeopardy CTF — ideal for learners who want to con

Russian CTF Cup 2025, Qualifier. https://ctfcup.ru/registration 12:00 UTC+3 (Moscow) 02 November - 12:00 UTC+3 (Moscow) 03 November. Online.

SAS CTF is an international competition for cybersecurity experts, held as a part of the Security Analyst Summit conference. The competition consists of an online Jeopardy qualification stage and on-site Attack-Defense finals. We are inviting Top 8 teams that completed the SAS CTF qualification round to compete for a share of the $18.000 prize pot at SAS 2025 in Khao Lak, Thailand on October 25-28.

The First Ever Singapore Student Merger CTF is Here! SSMCTF is a 36 hour beginner-friendly Capture the Flag competition made for students. There are 8 exciting categories — including a Beginner track to help you get started! You may form teams of up to 4 and register by 13th June to compete! Sponsored by Cyber Cohesion and OffSec

We invite you to participate in an exciting 4-hours Capture The Flag (CTF) Hacking competition in the beautiful island of Bali. This event is designed to be beginner friendly while still offering plenty of challenges for more experienced participants. Through a series of engaging, real-world cybersecurity challenges, you’ll gain practical experience, learn new techniques, and connect with like-minded individuals who share your passion for technology and cyber security. Participants will face tasks across categories such as Web Exploitation, Reverse Engineering, Binary Exploitation, OSINT, and even AI-related challenges. Each challenge is carefully crafted to test your problem-solving skills, critical thinking, and cybersecurity knowledge. This competition is hosted by PT Sawah Cyber Security as part of our initiative to promote cybersecurity awareness in Indonesia. We aim to bridge academic and professional communities by encouraging ethical hacking practices and industry-level skills. The event is open to universities, private companies, and independent participants alike, to grow interest and capabilities in the cybersecurity field.

The US Cyber Games program is hosting its Season V, US Cyber Open Beginner's Game Room CTF. The Beginner's Game Room is the entry-level component of the US Cyber Open and a great place to solve your first-ever challenge(s), or warm up for more of a challenge in our Season V, US Cyber Open Competitive CTF.

The US Cyber Games program is hosting its Season V, US Cyber Open Competitive CTF. The Competitive CTF is for those ready to put their knowledge and skills to the test. Challenges will range from intermediate to advanced in difficulty, and all challenges will be delivered via CTF-d.

Securinets CTF Quals 2025 is an online jeopardy style CTF organized by Securinets INSAT. The CTF will feature these categories: Web, Reverse Engineering, Pwn, Crypto, Forensics, OSINT, Misc, AI... Only 10 teams will qualify to the final CTF + top 5 from north africa . Registration will be open soon. Join our discord server: https://discord.gg/Xqj6WnNmbQ Infra sponsored by goo.gle/ctfsponsorship

SekaiCTF returns for its fourth edition! While the overall difficulty has been designed to suit intermediate and advanced participants, we've also included beginner-friendly tasks to ensure newer players can join in and enjoy the experience. SekaiCTF 2025 will serve as dual prequalifier for MaltaCTF 2025 Finals and the 10th XCTF Finals. Discord: https://discord.gg/6gk7jhCgGX [+] Prize Pool ・USD $10,000 in cash and over $15,000 worth of prizes ・The top two teams will earn qualification for the following onsite events: ​ ​ ​ ​ ​ ​ ​ ​・The 10th XCTF Finals in China (2026): https://adworld.xctf.org.cn/ ​ ​ ​ ​ ​ ​ ​ ​・The inaugural MaltaCTF Finals in Valletta, Malta (2025): https://2025.ctf.mt/ ※ The first-place team may choose their preferred event; second-place team will qualify for the other. XCTF Finals covers full flights and accommodation; MaltaCTF Finals covers €450 per person for flights and full accommodation. [+] Sponsors ・OtterSec (https://osec.io/) ・Zellic (https://www.zellic.io/) ・Trail of Bits (https://www.trailofbits.com/) ・Sec3 (https://www.sec3.dev/) ・Vector 35 / Binary Ninja (https://binary.ninja/) ・Hack The Box (https://www.hackthebox.com/) [+] Partners ・Google Cloud (https://cloud.google.com/) ・XCTF League ・Friendly Maltese Citizens

A Jeopardy style online Capture The Flag competition to upbring and promote women in the industry. It's a beginner friendly CTF. Discord : https://discord.gg/hH7WXcgsXk The CTF will include following categories:- Web Reverse Pwn DFIR Crypto Box Android Misc/Osint

The Sardinia Cyber Camp will bring the top 10 teams from the qualification round to compete live in Sardinia. Alongside the onsite CTF, the event will also host a cybersecurity fair and conference.

In the retro kingdom of SegFaultia, chaos has erupted. The dastardly Heap Hopper, a rogue programmer turned villain, has kidnapped Princess Pomegrante and locked her away in the infamous Stack Dungeon, a fortress built entirely of corrupted memory stacks and unstable code. The kingdom’s last hope is Super Jumpio, a daring, mustachioed hero known for his incredible leaps and unmatched debugging skills. Armed with his Binary Boots and trusty Debugger Hat, Super Jumpio must navigate through levels of vulnerable code, leaping over buffer overflows, smashing through bad pointers, and outwitting Heap Hopper’s dynamic linker traps. To prevail, Super Jumpio must jump, debug, and smash his way to victory, rescuing the Princess and restoring stability to SegFaultia!

Standoff is a large-scale cyber battle simulating real-world attacks and defenses on replicas of IT systems from various industries. Red and blue teams compete in a hyper-realistic virtual city, targeting or defending sectors like banking, energy, and telecom. Open to international teams only. Red teams test systems with any TTPs; blue teams investigate and respond to live attacks. When: October 6–8 Apply before: September 1 Standoff is not a classic attack-defense CTF. In terms of infrastructure, we're aiming to resemble real-world IT infrastructures instead of single VMs or tasks. In some ways, you can compare it with Pro Labs on Hack The Box. Our range consists of several of these infrastructures, each representing some kind of enterprise (e.g., a bank, an IT company, or even a metal production facility), and as an attacker, you'll have to breach the perimeter, perform some lateral movement inside, and then find and solve the tasks. You'll also have to fill out a pentest-like report on your actions to score. The blue teams will either monitor their piece of infrastructure and write reports on incidents that occurred there, or, in some cases, they will actively counter the attackers by using EDR software. Also, you can try out online ranges at https://standoff365.com/en-US/ to get an idea of what to expect at the main event. Please contact https://x.com/amoshkov if you have any questions.

STARPWN CTF 2025 A Capture the Flag competition at DEF CON 33 hosted by the Aerospace Village Our goal is to bring together hackers from around the globe to work on space related challenges. From easy to hard challenges, it should have something for all skills levels. Join us on this journey through the stars! Are you up for the challenge? Register your team now! https://app.metactf.com/starpwn-2025 Starts at 0900 on 8/8, End at 1200 on 8/9 (PDT) Available online for everyone to join, but you can also drop by the Aerospace Village to find this and much more! Brought to you by: Aerospace Village Ethos Labs Visionspace Sixgen Cal Poly - California Cybersecurity Institute MetaCTF

Welcome to the tenth year of SunshineCTF, hosted by Hack@UCF in affiliation with BSides Orlando 2025. See our website for the most accurate and up to date information!

Toronto's longest-running security meetup. Monthly evening talks from local practitioners followed by drinks. Free to attend.

This year, The Few Chosen are thrilled to host our fifth annual Capture The Flag (CTF) event, set to take place from August 29th to 31st, 2025. We, a committed team of cyber enthusiasts who've cut our teeth on countless CTFs, are channelling our passion for cybersecurity into curating this unique, immersive CTF experience. We've meticulously engineered the event's website from scratch, ensuring a seamless and enriching user experience. Our diverse set of challenges spans Pwn, Reverse, Web, Crypto, and Misc. Mark your calendars for a uniquely immersive cybersecurity adventure. The Few Chosen CTF 2025: The perfect platform for honing skills, fueling passions, and embracing the cybersecurity community. https://discord.gg/nVYv3mHKUf Sponsors: Google OffSec CyberEDU OtterSec Zellic HackTheBox Partners: Orange Romania Infra sponsored by goo.gle/ctfsponsorship

TJCTF is an international cybersecurity competition hosted by TJ Computer Security Club (TJCSC), a group of students from Thomas Jefferson High School for Science and Technology in Northern Virginia. Prizes are sponsored by Trail of Bits and Zellic. Twitter: https://twitter.com/tjctf Email: contact@tjctf.org Discord: https://discord.gg/w5xapGP Competition is online.

The CTF Team of the Delft University of Technology is hosting its yearly CTF in-person on the TU Delft campus on November 15th. It’s designed to be beginner-friendly, so whether you’re new to CTFs or have some experience, you’ll find plenty of engaging challenges to dive into. You can form a team of 4, or sign up individually and you'll be matched with others. Looking forward to seeing you there!

Welcome to ToH CTF 2025! We are Tower of Hanoi, a CTF team based in Milan, founded back in 2004. You might remember us from past events such as poliCTF, last hosted in 2017. Now we're back, bringing you an exciting event for all skill levels and interests. This year's competition includes challenges across the main categories: Pwn, Rev, Web, Crypto, and Misc. Are you up for the challenge? Register your team now! https://2025.ctf.towerofhanoi.it/ Discord: https://discord.gg/Efq5xRagj6 Infra sponsored by goo.gle/ctfsponsorship

University of Illinois student-run jeopardy CTF (SIGPwny).

UIUCTF is an annual capture-the-flag competition hosted by SIGPwny, the cybersecurity club at the University of Illinois Urbana-Champaign (UIUC).

SIGPwny UIUCTF — spring 2026 edition (scheduled).

A global, open-to-all CTF dedicated to sharpening offensive and defensive skills through real-world, national cyber incident scenarios. Participants will tackle multi-level challenges in Web Exploitation, Reverse Engineering, Cryptography, Forensics, and OSINT to test their vulnerability-hunting capabilities. Top performers receive verified certificates, special prizes , and public acknowledgements signed by the leadership. Participants also gain direct recruitment visibility with leading security teams.

University of Toronto student CTF (January 2026).

V1t CTF 2025 is a beginner-friendly and intermediate Capture The Flag competition organized by V1t. The event will be held online in Jeopardy format, covering various categories such as web exploitation, reverse engineering, cryptography, forensics, and miscellaneous challenges.

VolgaCTF is an international inter-university cybersecurity competition organised by a group of IT enthusiasts based in Samara, Russia. The final round is held onsite at Lotte Hotel Samara.

Get ready to hack! The CTF is back at WHY2025! Brought to you by the same team behind the legendary CTFs at OHM2013, SHA2017, and MCH2022. After a well-earned break, we’re back—bigger, better, and more challenging than ever! Just like in 2022, we will have both online and on-site challenges, making the CTF accessible to everyone. Whether you’re a seasoned hacker or a total beginner, there’s a challenge waiting for you. For event info go to https://why2025.org/

WMCTF is a Jeopardy-style Online Capture The Flag Competition presented by W&M. The contest is opened to all participants around the world. Teams can compete from any location. Platform: https://wmctf.wm-team.cn/ Registration: https://wmctf.wm-team.cn/ Discord: https://discord.gg/WRmvFkWnSn QQ Group: 727697644 Enjoy your time!

Join us for the fourth edition of WP CTF and challenge yourself against top cybersecurity talent. This Jeopardy-style Capture The Flag (CTF) competition features many challenges to be solved within 8 hours. Open to university students with a passion for cybersecurity. International participation is encouraged. Teams can consist of up to 5 members. CTF Difficulty Level: Intermediate to Advanced. Organizer: Würth Phoenix Confirmed sponsors 2025: Volksbank Alto Adige, Innova, Gravitate, Alpitronic, HGV Service Genossenschaft, Würth Italia and Longo.

UWaterloo's Cybersecurity Club brings you a jeopardy-style online CTF, open to all! Primarily aimed at beginner-to-medium level, but with some hard challenges to test the most skilled as well.

Web Arena CTF – Powered by Sturtle Security Pvt. Ltd. Get ready to test your cybersecurity skills in an intense 24-hour Capture The Flag (CTF) challenge hosted on the CSEM (Cyber Security & Ethical Mastery) platform. From 18th October to 19th October, participants from across the community will come together to solve real-world cybersecurity challenges, ranging from web exploitation, cryptography, reverse engineering, forensics, and more. This is not just a competition – it’s an opportunity to learn, collaborate, and showcase your skills in front of industry professionals. Whether you’re a beginner exploring CTFs or an experienced player, the Web Arena CTF offers a level playing field for all. Event Highlights: ✅ 24 Hours Non-Stop Challenge ✅ Hosted on csem.sturtles.in

Hack, solve, and conquer — a CTF designed to challenge minds of all levels. World Wide Flags is back this year with World Wide CTF 2025! More Prizes, More Categories, and Much More Fun! We are planning to have this year the following categories: - Reverse - Web - Crypto - Pwn - OSINT - Forensics - Web3 - Jail and more! Join the official discord for updates: https://discord.gg/guwaGy3ftN This CTF wouldn't be possible without the support of our sponsors! <b>Gold Sponsor:</b> Kaspersky <b>Silver Sponsors:</b> Caido Parrot CTFs Zellic OtterSec <b>Prize Sponsors:</b> NordVPN NordProtect NordPass Incogni Saily CyberWarFare Labs Altered Security LetsDefend OffSec Infra sponsored by <a href="https://goo.gle/ctfsponsorship" rel="nofollow">goo.gle/ctfsponsorship</a>

? ZeroDay CTF 2025 - by Z3R0_L0G0N ? Ready to hack through the night of Halloween? ZeroDay CTF is back - darker, tougher, and deadlier than ever! Hosted by Z3R0_L0G0N, the cybersecurity club of Jalpaiguri Government Engineering College (India), ZeroDay CTF made waves last year with global participation from over 40+ countries and hundreds of players battling it out for glory. This year, we’re summoning the spirits of challenge - with brand-new tasks, trickier exploits, and 24 hours of nonstop hacking chaos. ? Duration: 24 hours ? Mode: Online, solo participation ? Difficulty: Beginner - Intermediate ? Rewards: Prizes(TBD), certificates for all participants, and ultimate bragging rights ? Join our Discord: https://discord.gg/3mwQ9kQdx8 So grab your hoodie, fire up your VPN, and get ready to haunt the scoreboard this Halloween. Only one question remains... Will you survive the night? ?‍☠️

Team bi0s invites you to our prestigious bi0sCTF 2025, a premier hacking event designed for hackers of all generations. We are dedicated to crafting challenges that incorporate the latest vulnerabilities, responsibly pushing the boundaries of innovation to ensure a delightful and enriching experience for all participants. Stay tuned for official updates by following us on https://twitter.com/teambi0s. Prizes: 1st place - $1500 2nd place - $1000 3rd place - $500 + $300 Writeup prizes!

Organized by the Crusaders of Rust (a.k.a. Starrust Crusaders), an American and European security research organization. Infra sponsored by <a href="https://goo.gle/ctfsponsorship">goo.gle/ctfsponsorship</a> Prizes sponsored by OtterSec, RET2 Systems, Trail of Bits, Binary Ninja, and Research Innovations.

A CTF by a friendly team of farmers. Includes challenges of the following categories: - pwn - reverse - crypto - web - misc Official writeups are available at https://github.com/pwnlentoni/cornCTF-2025-public

Latin America's largest security conference. Spanish/English program, an extensive village floor and a wildly fun social scene in Buenos Aires.

7th Edition of Hackcon, the flagship CTF by team d4rkc0de as a part of ESYA 2025 HackCon is a jeopardy style competition that includes challenges in the domain of Reverse Engineering, Web Exploitation, Clever Scripting, and general "hacks". There is a flag associated with each level. To successfully complete the level you have to get the flag and submit.

The fourth iteration of idekCTF! join our discord server: https://discord.gg/UDvQyHF42a NOTE: The CTF will be starting 8 hours later than shown on ctftime.

This is the second jailCTF event. Unlike traditional CTFs, this event has a large focus on "jail" challenges which ask players to escape out of a code sandbox with some set of restrictions applied. Categories here aren't traditional here either, with pyjail, esolang, and other mainstream languages as categories (js, perl, ruby, c, etc). Come and have fun in jailCTF! Discord: https://discord.gg/JxtuFxMaE8 Infra sponsored by https://goo.gle/ctfsponsorship Sponsored by Zellic!!! https://www.zellic.io/ Sponsored by OtterSec!!! https://osec.io/ More information about our sponsors can be found on https://ctf.pyjail.club/ and in the discord!

A 2025 justCTF jeopardy competition is coming! Sponsors: - Trail of Bits - OtterSec - Zellic - HexRays

m0leCon CTF 2026 Teaser is an online jeopardy-style CTF organized by pwnthem0le. Top 10 teams will be invited to the final event, that will take place in Spring 2026 at Politecnico di Torino. info: info@m0lecon.it

openECSC is a cybersecurity competition open to everyone that invites enthusiasts to participate without any kind of limitations. Launched in 2022 as an extension of the European Cybersecurity Challenge, it aims to broaden participation beyond traditional age and nationality restrictions, featuring a series of jeopardy-style CTF competition rounds. openECSC 2025 will run September 29th through October 5th. Visit https://openec.sc/ for more information.

Welcome to the second edition of osu!gaming CTF! osu! (https://osu.ppy.sh/) is a fast-paced, precision-oriented rhythm game where players click, slide, and spin their way through difficult beatmaps. With osu!gaming CTF, we're bringing that same excitement to the world of capture-the-flag. In this jeopardy-style CTF, every challenge is themed around osu! and popular rhythm games. Whether you're a rhythm game veteran looking to try your hand at hacking, or a CTF competitor curious about the osu! community, osu!gaming CTF offers a fun learning experience that bridges both communities. Join our Discord server (https://discord.gg/pJ5VpFKduN) to connect with other participants, find teammates, and stay updated on announcements. Happy hacking!

Spring 2024 edition of picoCTF.

Spring 2025 edition of Carnegie Mellon's educational CTF for students worldwide.

saarCTF is an annual Attack-Defense CTF competition organized by saarsec, the CTF team of Saarland University.

scriptCTF is a 48-hour jeopardy style CTF for hackers to test their skills against creative and innovative CTF challenges. We have mostly beginner friendly challenges, with a few hard ones. scriptCTF makes CTFs fun and approachable for all skill levels! This is hosted by ScriptSorcerers and some members of n00bzUnit3d (as a replacement of n00bzCTF). Team Limit: 4 members Discord: https://discord.gg/c9xaJFW449

sknbCTFは日本のCTFチームである「sknb」が主催するサイバーセキュリティコンテストです。 sknbCTF is a cybersecurity contest hosted by the Japanese CTF team "sknb."

The first ever CTF hosted by .;,;. (also known as smiley), America's #1 CTF team*! *in 2024, according to CTFtime Join our Discord: https://discord.gg/agpgGW372M ## Categories: Cryptography, pwn, reverse engineering, web exploitation, blockchain, miscellaneous. ## Sponsors: OtterSec - osec.io Zellic - zellic.io Veria Labs - verialabs.com Infra sponsored by goo.gle/ctfsponsorship

Top 15 teams from the entire world will be invited to partecipate in the Finals in Lignano Sabbiadoro, Udine, Italy. The event will be a jeopardy-style CTF featuring challenges from many categories, including pwn, web, reversing, crypto, forensics and network. Note: time is tentative and it indicates the duration of the entire event, not only of the main CTF.

SnakeCTF is an online jeopardy-style CTF featuring challenges from many categories, including pwn, web, reversing, crypto, forensics and network. This event serves as a qualification for the Finals. We will invite top teams to the Finals, which will be held on-site (Italy) in November/December 2025. Infra sponsored by goo.gle/ctfsponsorship

Beginner-friendly platform with bite-sized challenges across the standard CTF categories.

Crypto-focused platform with theory and challenges grouped by primitive: RSA, ECC, AES, hashing, lattices, post-quantum.

Online platform with thousands of machines, challenges, and the Pro Labs / Endgames campaigns.

Structured cybersecurity courses with hands-on labs, from Linux Fundamentals to advanced Active Directory paths.

Free web hacking course and CTF run by HackerOne. Completing flags can earn invitations to private bug bounty programs.

Wargames teaching Unix, networking and security concepts level by level (Bandit, Natas, Leviathan, Narnia, Krypton…).

Free web security training from the makers of Burp Suite: deep coverage of SQLi, XSS, SSRF, auth, race conditions, prototype pollution, etc.

French CTF platform with hundreds of challenges across web, crypto, forensics, reversing, network and more.

Browser-based rooms covering offensive and defensive security, from intro to advanced.

Library of downloadable vulnerable VMs (Kioptrix, Mr. Robot, DC series…) for offline boot-to-root practice.

Free educational CTF run by Carnegie Mellon. The picoGym hosts every past challenge.

ASU course covering binary exploitation, kernel exploitation and reverse engineering with a dojo-based progression.

Classic PHP/MySQL training app exposing OWASP Top 10 issues at four security levels (Low, Medium, High, Impossible).

Modern JS-stack vulnerable web application covering every major web vulnerability class, gamified via a Score Board.

Free, open-source vulnerable web app for learning OWASP Top 10 attacks with hints and per-level difficulty.

Java-based deliberately insecure application with guided lessons across web security topics.

Buggy Web Application — PHP+MySQL training target with 100+ deliberately introduced vulnerabilities.