Misc CTF challenges

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

Top misc techniques

Challenges

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Challenge	CTF	Weight	Has
Rohald #twisted-edwards-curve #curve-parameter-recovery #edwards-to-weierstrass #ecdlp	Crypto 2021	36.00	files wu 1
trustedhash #tpm2 #remote-attestation #sealed-object #pcr	R3CTF 2026	35.95	files wu 1
null #top-chunk-overwrite	N1CTF 2018	24.41	files wu 1
Tons_of_Fun #ton-smart-contract	BuckeyeCTF 2025	–	files wu 1
timemachine #timing-side-channel #bruteforce	rgbCTF 2020	19.74	files wu 1
NetFS_2 #timing-attack #side-channel #password-bruteforce	zer0pts 2023	52.62	files wu 1
Secret_Service #tcbhead-canary-bypass	InCTF 2020	53.95	files wu 1
Baby_Tcache #tcache-poisoning #free-hook-overwrite #libc-leak	BackdoorCTF 2019	56.00	files wu 1
USER-ADMINISTRATION #tcache-poisoning #free-hook #heap-leak	Rooters 2019	24.23	files wu 1
EasyWrite #tcache-poisoning	N1CTF 2020	36.00	files wu 1
card #tcache-poisoning	GACTF 2020	–	files wu 1
studysim #tcache-poisoning	HSCTF 2020	–	files wu 1
toddler_cache #tcache-poisoning	HackPack 2020	–	files wu 1
Aria_Writer #tcache-poisoning	HSCTF 2019	–	files wu 1
Aria_Writer_v3 #tcache-poisoning	HSCTF 2019	–	files wu 1
Ramen #tcache-poisoning	Harekaze 2019	23.87	files wu 1
babyheap #tcache-poisoning	FireShell 2019	24.49	files wu 1
schmaltz #tcache-poisoning	InCTF 2019	37.00	files wu 1
SecureMessage #tcache-poisoning	MeePwn 2018 Quals	24.59	files wu 1
slot_machine #tcache-poisoning	Hack.lu 2018	72.75	files wu 1
Heap-Heap-Hooray #tcache-double-free	kksctf 2019	–	files wu 1
vi-deteriorated #tcache #cpp-exploitation	TokyoWesterns 2020	–	files wu 1
OK_BOOMER #t9-multitap-encoding	SunshineCTF 2025	51.65	files wu 1
no_write #syscall-filter #strncmp-oracle #stack-pivot	RCTF 2020	–	files wu 1
syscall_kit #syscall #mprotect #shellcode	zer0pts 2020	24.56	files wu 1
Subarray_Sums_101 #subset-sum #z3	TeamItaly 2023	24.88	files wu 1
Ace_of_Spades #strcpy-overlap #card-duplication #score-overflow #stack-read-write	PwnThyBytes 2019	25.00	files wu 1
Meeting #steganography #stegcracker #android	RaziCTF 2020	21.91	files wu 1
Tribble_with_my_Skin #steganography #png	SunshineCTF 2025	51.65	files wu 1
Oversized_Downlink #steganography	Starpwn 2026	–	files wu 1
Baby_two #stack-pivot #ret2dlresolve	Securinets 2019 Quals	22.72	files wu 1
syrup #stack-pivot	NahamCon 2020	23.72	files wu 1
tokenizer #stack-pivot	ISITDTU 2019 Quals	23.38	files wu 1
ByteCafe #stack-overflow #variable-overwrite #gets	ByteCTF 2020	–	files wu 1
babystack #stack-overflow #saved-rbp-overwrite #one-gadget	BambooFox 2021	24.15	files wu 1
WelcomeToPwn #stack-overflow #ret2win	boot2root 2020	24.93	files wu 1
binary-exploitation-is-ez #stack-overflow #ret2win	COMPFEST 2020	–	files wu 1
shellCode #stack-overflow #ret2shellcode	boot2root 2020	24.93	files wu 1
baby-pwn #stack-buffer-overflow #shellcode #no-aslr	CyberSecurityRumble 2020	28.00	files wu 1
Mini-Game #stack-buffer-overflow #shellcode	SPbCTF 2021 Quals	–	files wu 1