Description
Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
Affected products
microsoft: 365 copilot
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100 Vendor Advisory
Metrics
- CVSS 3.1
-
4.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 16 · as of 14 November 2026
- CWE
- CWE-284
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.