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CRITICAL · 9.3

CVE-2026-24307

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

Vulnerability Description

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

CVSS Score

9.3

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
Microsoft365 Copilot-

Related Weaknesses (CWE)

CWE-1287

References

FAQ

What is CVE-2026-24307?

CVE-2026-24307 is a vulnerability with a CVSS score of 9.3 (CRITICAL). Improper validation of specified type of input in M365 Copilot allows an unauthorized attacker to disclose information over a network.

How severe is CVE-2026-24307?

CVE-2026-24307 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-24307?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft 365 Copilot.