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December 8-11, 2025
Excel London / United Kingdom

Contests

ZERODAY CLOUD: Cloud Hacking Competition

Wiz Research is calling the world's top security researchers: test your skills, make a difference, and help shape the future of cloud security. Join this first-of-its-kind cloud and AI hacking competition and find zero-day vulnerabilities in core open-source software powering the cloud. There's a prize pool of up to $5M, partner support from AWS, Google Cloud, and Microsoft, and the chance to demonstrate your exploit live on stage at Black Hat Europe, December 10-11, 2025.

Learn more here.


ZERODAY CLOUD: Operation Cloudfall

Live CTF Challenge - $20,000 in prizes

Participate in Operation Cloudfall, a live Capture the Flag (CTF) event during Black Hat Europe & ZeroDay.Cloud, Dec 10–11.

Here's what you need to know:

  • Two challenge tracks: Cloud & Web and Pwn & Reversing
  • In-person only — participation requires venue access with a Black Hat Business Hall Pass

Learn more here.