$ ctf42

Pwn CTF challenges

3,926 Pwn CTF challenges from 382 CTFs (2011–2026), 1,025 with writeups.

Top pwn techniques

#stack-buffer-overflow 95 #format-string 88 #rop 76 #use-after-free 56 #ret2win 55 #shellcode 48 #ret2libc 37 #heap 35 #heap-overflow 34 #tcache-poisoning 29 #got-overwrite 29 #stack-pivot 25 #buffer-overflow 23 #heap-exploitation 21 #seccomp 19

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Has
Copy_and_Paste_2 IERAE 2025 – files
CorServices_Analyzer corCTF 2025 82.00 files
CorServices_Defender corCTF 2025 82.00 files
Crash HeroCTF 2025 – files
Crazy_FSOP AmateursCTF 2025 – files
Crossbow CyberApocalypse 2025 – files
Cursed_PQ SECCON 2025 Quals – files
Cursed_ST SECCON 2025 Quals – files
Cute_Fox_Article_and_CGI NoHackNoCTF 2025 23.47 files
Cybershop MCTF 2025 Quals – files
DNA_Reconfiguration_Lab CRHC 2025 – files
Dat_Overflow_Dough BrunnerCTF 2025 24.66 files
DataDefinition GoogleCTF 2025 – files
Data_saver 1753CTF 2025 34.82 files
Date_service CrateCTF 2025 – files
DeadStock DeadSec 2025 31.29 files
DeadV8_Sandbox DeadSec 2025 31.29 files
Debtors_Database QnQSec 2025 24.76 files
Debug_1 TAMUctf 2025 – files
Deja_vu FortID 2025 30.00 files
Dejavu WannaGameChampionship 2025 – files
Devils_Convergence BackdoorCTF 2025 – files
DryWall WolvCTF 2025 47.25 files
Dupocalypse Pragyan 2025 – files
E_Corp_Part_2 UTCTF 2025 – files
Easy_Bof AmateursCTF 2025 – files
EchoNet V1T 2025 – files
Eidi_Diary Nowruz 2025 – files
Eidolon_Core MCTF 2025 Quals – files
Eidolon_Core_2 MCTF 2025 Quals – files
Einstein PwnMe 2025 Quals 24.95 files
Endless_behaviour Kind4SUS 2025 – files
Entropy_Mixer BlitzCTF 2025 23.20 files
Extremely_Lame_Filters_1 squ1rrel 2025 24.25 files
Extremely_Lame_Filters_2 squ1rrel 2025 24.25 files
EzDB TPCTF 2025 – files
FONSTER Hack.lu 2025 98.02 files
FSWn3d BreachCTF 2025 23.86 files
Fact UMassCTF 2025 48.38 files
Fantastic_doom EHAX 2025 – files