0xFUN 2026
0xFUN CTF is an online, 48-hour jeopardy-style Capture The Flag competition designed for intermediate to advanced players, featuring technically challenging problems that emphasize deep understanding, practical exploitation skills, and creative problem-solving in a competitive yet engaging environment.
Join our Discord to stay updated with the latest announcements and prize additions. https://discord.gg/gUC7Heffdu
Categories - Web - Pwn - Reverse Engineering - Cryptography - Forensics - OSINT - Misc - …more : )
We like to thanks our sponsors [+] ApiSec University [+] TrainSec.net [+] Cybersharing [+] Gen.xyz [+] hackviser [+] Rapid Risk Radar [+] Cyberwave.network [+] Hackerdna.com [+] Jsmon Security [+] KnightSquad Academy
Web 1
| Challenge | Has |
|---|---|
| SkyPort_Ops | files |
Pwn 7
| Challenge | Has |
|---|---|
| 67 | files |
| 67_revenge | files |
| Fridge | files |
| Warden | files |
| What_you_have | files |
| bit_flips | files |
| chaos | files |
Reverse 7
| Challenge | Has |
|---|---|
| Chip8_Emulator | files |
| Guess_The_Seed | files |
| Liminal | files |
| Nanom_dinam_itee | files |
| Pharaohs_Curse | files |
| Unravel_Me | files |
| pingpong | files |
Crypto 13
| Challenge | Has |
|---|---|
| Back_in_the_90_s | files |
| BitStorm | files |
| Delicious_Looking_Problem | files wu 1 |
| Hawk_IH4DI | files |
| Hawk_II | files |
| Leonine_Misbegotten | files wu 1 |
| MeOwl_ECC | files |
| Music | files |
| Oracle | files |
| The_Fortune_Teller | files |
| The_Roulette_Conspiracy | files |
| The_Slot_Whisperer | files wu 1 |
| baby_HAWK | files |
Forensics 11
| Challenge | Has |
|---|---|
| Bard | files |
| DTMF | files |
| Ghost | files wu 1 |
| Lines_of_Contact | files |
| Melodie | files |
| Nothing_Expected | files |
| Pixel_Rehab | files |
| PrintedParts | files wu 1 |
| TLSB | files |
| Tesla | files wu 2 |
| kd | files wu 1 |
Misc 9
| Challenge | Has |
|---|---|
| Broken_Piece | files |
| Deep_Fried_Data | files |
| Dots | files |
| Emojis | files |
| Insanity_1 | files |
| Skyglyph_II_Blind_Drift | files |
| Skyglyph_I_Guide_Star | files |
| Spectrum | files |
| UART | files |
OSINT 3
| Challenge | Has |
|---|---|
| GeoSkill | files |
| Temptation._Stone._Silence. | files |
| Tragedy | files |
Hardware 3
| Challenge | Has |
|---|---|
| Analog_Nostalgia | files |
| Digital_Transition | files |
| Packet_Stream | files |