CVE-2025-59272: Microsoft 365 Copilot Chat

Critical severity, CVSS 9.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to perform information disclosure locally.

Affected products

• Microsoft 365 Copilot Chat: affected versions not specified

Published 2025-10-09. Last modified 2026-10-08.