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MEDIUM · 4.4

CVE-2026-41100

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

Vulnerability Description

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

CVSS Score

4.4

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
Microsoft365 Copilot< 16.0.19822.20190

Related Weaknesses (CWE)

CWE-284

References

FAQ

What is CVE-2026-41100?

CVE-2026-41100 is a vulnerability with a CVSS score of 4.4 (MEDIUM). Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

How severe is CVE-2026-41100?

CVE-2026-41100 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-41100?

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