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CVE-2026-41100ImportantRevised 9 Jun

Microsoft 365 Copilot for Android Spoofing Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Important
CVSS base score
4.4CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
Impact
Spoofing
EPSS, next 30 days
0.3%Higher than 15.6% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Exploitation Unlikely
Publicly disclosed
No
Customer action
Required: apply the update
Component
M365 Copilot
Weakness
CWE-284: Improper Access Control
Issued by
Microsoft
Published
12 May 2026 · May 2026
Last revised
9 Jun 2026Added Microsoft Excel for Android, Microsoft Word for Android, Microsoft Loop for Android, Microsoft PowerPoint for Android and Microsoft OneNote for Android softwares to the Security Updates table. Customers that are running supported version of these products are encouraged to update to the indic…

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Apps, Microsoft Office
6 affected products
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