CVE-2026-41100: Microsoft 365 Copilot

Medium severity, CVSS 4.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

Affected products

• Microsoft 365 Copilot: before 16.0.19822.20190 (fixed in 16.0.19822.20190)

Published 2026-05-12. Last modified 2026-06-17.