On-site Cloud Security CTF at zeroday.cloud in London
CHALLENGE #1
CHALLENGE #2
CHALLENGE #1 WINNER
Best in cloud and web security
Awarded to top team in Challenge #1
GRAND PRIZE
Best overall performance
Awarded for best overall performance
CHALLENGE #2 WINNER
Best in pwn and reverse engineering
Awarded to top team in Challenge #2
In order to be eligible for prizes, each contestant must be at the age of majority in their country and may not be a resident of Russia, China, Lebanon, Syria, Libya or any embargoed or sanctioned country (including the Crimea, Luhansk, Kherson, Zaporizhzhia or Donetsk regions, Cuba, Iran, North Korea or Sudan) or otherwise be listed on any sanctioned, denied or barred persons list. Eligibility for prizes is subject to HackerOne verification (can be completed after competition). Winners are responsible for taxes.
Mission Brief
ATTENTION, FIELD AGENT: Your special skillset is required for a high-value covert operation in London.
Your mission, should you choose to accept it, will test your cloud security skills to find critical intelligence, and save the Kingdom from certain doom.
Only the most skilled operatives will succeed and take our grand prize.
Do you have what it takes to complete Operation Cloudfall?
Mission Commences In
Time & Place
Venue access is free. Register for your complimentary Business Hall pass
ExCeL, London, UK | December 10-11, 2025