CSS CTF 2026: Return of Nexus

Organized by suɐǝpodᴉʇuɐ

CSS CTF 2026: Return of Nexus is a 40-hour online Capture The Flag competition organized and hosted by the USYD Cybersecurity Society. A year after the network went dark, the Quantum Nexus Network is back online. Join us for a 40-hour sprint featuring challenges spanning Web Exploitation, PWN, Reverse Engineering, Cryptography, Forensics, OSINT, and AI/Prompt Injection across skill levels. O

Dates: Sep 30, 2026 – Oct 1, 2026
Mode: Online
Prize pool: non-cash prizes
Entry: free

Official event page

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