2026from public repositories
Fennec CTF Writeups 2026
3 challenges with 5 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveBinary exploitation2
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Solve it with:ROP gadget finderShellcode assembler and libraryCyclic pattern generator and offset finderFormat string exploit builderLearn: Binary exploitation
Also written up in: N4dj1b/Fennec-CTF-2026-Writeups, N4dj1b/Fennec-CTF-2026-Writeups
Semploit
2 official solutionsAlso written up in: N4dj1b/Fennec-CTF-2026-Writeups, N4dj1b/Fennec-CTF-2026-Writeups
Reverse engineering1
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Solve it with:Strings extractor for binaries and blobsWebAssembly disassemblerJava .class disassemblerPython .pyc bytecode disassemblerLearn: Binary exploitation
Frame It Like Its Hot
1 official solutionAlso written up in: N4dj1b/Fennec-CTF-2026-Writeups