[CTF TIME AMENDMENT] GreyCTF 2026 Qualifiers will be held from 30 May 10am (SGT GMT+8) to 31 May 10am (SGT GMT+8)

Grey Cat The Flag is an annual CTF organized by NUS Greyhats, supported by National Cybersecurity R&D Labs (NCL).

Top eligible academic teams will continue to compete in the Grey Cat The Flag finals in Singapore. Please refer to https://ctf.nusgreyhats.org/#-stat-ctf for more details on team eligibility.

Registrations are live at https://ctfd.nusgreyhats.org/register

Do let us know if you have any queries via our discord (https://discord.gg/xWaYxeKQKX) and follow us on our socials (https://linktr.ee/nus.greyhats)

Infra sponsored by goo.gle/ctfsponsorship