Misc CTF challenges

3,995 Misc CTF challenges from 420 CTFs (2011–2026), 705 with writeups.

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Challenges

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Challenge	CTF	Weight	Has
Baby_Heap	BackdoorCTF 2019	56.00	files wu 2
Multi_Heap	TokyoWesterns 2019	–	files wu 2
Part5-typechecker	N1CTF 2019	24.41	files wu 2
SecretKeeper	Pragyan 2019	20.69	files wu 2
gnote	TokyoWesterns 2019	–	files wu 2
mi	TokyoWesterns 2019	–	files wu 2
no_risc_no_future	Hack.lu 2019	68.75	files wu 2
pwn101	ASIS 2019 Quals	61.07	files wu 2
secureshell	WPICTF 2019	–	files wu 2
pwn03	WhiteHat 2018 Quals	–	files wu 2
pwn2-box	nullconHackIM 2018	–	files wu 2
Sheep_loves_Maths #zip-crc32-bruteforce #archive-forensics	vsCTF 2023	23.32	files wu 1
GoogleWayback #xss #csrf	WeCTF 2022	36.12	files wu 1
mafuyuuuuu #xoshiro256 #prng-state-recovery #dotnet-random	R3CTF 2026	35.95	files wu 1
This_is_NOT_the_flag #xor-bruteforce	BCACTF 2024	–	files wu 1
ATourofx86-Part2 #x86-bootloader-reversing #disk-address-packet #static-analysis	CSAW 2018 Quals	30.23	files wu 1
SignatureServer #winternitz-ots #signature-forgery #checksum-bypass	CTFZone 2018 Quals	23.92	files wu 1
breathofshadow #windows-kernel	HITCON 2019 Quals	92.94	files wu 1
dadadb #windows-heap	HITCON 2019 Quals	92.94	files wu 1
merry_cemetery #wasm	HackTM 2020 Quals	24.02	files wu 1
vmpwn #vm-pwn	GACTF 2020	–	files wu 1
kvm #vm-escape #kvm-hypervisor	CONFidence 2020 Finals	24.96	files wu 1
vimjail1 #vim-jail-escape	UIUCTF 2023	–	files wu 1
vimjail2 #vim-jail-escape	UIUCTF 2023	–	files wu 1
vimjail2.5 #vim-jail-escape	UIUCTF 2023	–	files wu 1
cake #vigenere-cipher	Bhackari 2026	–	files wu 1
omnitmizer #v8 #turbofan-escape-analysis #checkmaps-elimination #type-confusion	Pwn2Win 2020	63.56	files wu 1
refcnt #use-after-free (uaf)#tcache-poisoning #fsop	ASIS 2020 Finals	64.97	files wu 1
Shop #use-after-free (uaf)	SPbCTF 2021 Quals	–	files wu 1
TemporaryFileSystemStorage #use-after-free (uaf)	FireShell 2020	24.49	files wu 1
atoms #use-after-free (uaf)	HITCON 2020	–	files wu 1
fakev #use-after-free (uaf)	m0leCon 2020 Quals	24.55	files wu 1
treecache_alyx #use-after-free (uaf)	HSCTF 2020	–	files wu 1
zombie #use-after-free (uaf)	DownUnderCTF 2020	24.44	files wu 1
CookShow #use-after-free (uaf)	KipodAfterFree 2019	24.61	files wu 1
telescope #unsafe-unlink	HITCON 2020	–	files wu 1
dead_note_lv2 #unsafe-unlink	ISITDTU 2018 Quals	23.38	files wu 1
vecc #uninitialized-variable	DownUnderCTF 2020	24.44	files wu 1
internet_of_seat #uclibc-heap #realloc-overflow #got-overwrite	SECCON 2018 Quals	36.92	files wu 1
RIPC4 #type-confusion #rwx-shellcode	BSidesSF 2020	25.00	files wu 1