Top security researchers worldwide, subject to eligibility and registration through HackerOne platform by Nov 20, 2025.

What are the categories?

AI, Kubernetes & Cloud Native, Containers & Virtualization, Web Servers, Databases, and DevOps & Automation.

Bug bounties ranging from $10,000 to $300,000 per exploit, total prize pool around $4.5 million.

When are the event dates?

December 10-11, 2025, at Black Hat Europe Conference, London.

Register exploits through zeroday.cloud and HackerOne platform, complete verification by Nov 20, 2025.

Home/Browse/ZeroDay Cloud 2025

Technical Londoncompetition Applications open

Name: ZeroDay Cloud 2025
Start: 2025-12-10T00:00:00.000Z
End: 2025-12-11T23:59:59.000Z
Location: Black Hat Europe Conference

Date

December 10, 2025 – December 11, 2025

Where

Black Hat Europe Conference, London

Mode

offline

Entry

Free

#white hat#2025#cloud security#hacking contest#zeroday#bug bounties#black hat europe#opensource

FREE

Starts

Wed, 10 Dec

Entry

Free

Venue

Black Hat Europe Conference, London

Eligibility

College students

Free entry

Certificates

All participants get digital certificates.