CVE-2026-24307: Microsoft 365 Copilot

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Affected products

• Microsoft 365 Copilot: affected versions not specified

Published 2026-01-22. Last modified 2026-06-17.