Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Date: 2026-01
Affected: microsoft/365_copilot
Attack vector: other
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-24307
CWE: CWE-1287
CVSS: 9.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N)

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


Mitigations:

Architectural layers (MAESTRO):