CVE-2026-41100

Microsoft 365 Copilot for Android Spoofing Vulnerability

State: Published
Severity: 4.4 Medium
Published: May 12, 2026
Updated: Aug 10, 2026
Reserved: Apr 16, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	4.4 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
Microsoft 365 Copilot for AndroidMicrosoft	1.0 to before 16.0.19822.20190Affected
Microsoft Excel for AndroidMicrosoft	16.0.0.0 to before 16.0.19822.20190Affected
Microsoft Loop for AndroidMicrosoft	1.0.0 to before 16.0.19822.20190Affected
Microsoft OneNote for AndroidMicrosoft	16.0.1 to before 16.0.19822.20190Affected
Microsoft PowerPoint for AndroidMicrosoft	16.0.0.0 to before 16.0.19822.20190Affected
Microsoft Word for AndroidMicrosoft	16.0.0.0 to before 16.0.19822.20190Affected

References

Microsoft 365 Copilot for Android Spoofing Vulnerabilityvendor-advisorypatch

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