The University of Sydney's Cybersecurity Society is running CSS CTF 2026: Return of Nexus, a 40-hour jeopardy-style contest open to both solo players and teams starting September 30. The event's challenges span web exploitation, binary exploitation, reverse engineering, cryptography, forensics, OSINT, and even AI prompt-injection puzzles, giving players of any skill level something to work on. It's a good pick for anyone looking to test a broad range of security skills in one sitting.
// source: ctftime.org ↗