CVE-2025-53774: Microsoft 365 Copilot Chat

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Affected products

• Microsoft 365 Copilot Chat: affected versions not specified

Published 2025-08-07. Last modified 2026-06-17.