Medium severity · published May 12, 2026
CVE-2026-41100
Microsoft 365 Copilot for Android Spoofing Vulnerability
4.4
CVSS
0.2%
EPSS
No
On KEV
Description
Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
M3
Microsoft 365 Copilot for Android · Microsoft
1.0 before 16.0.19822.20190 · source: vendor
ME
Microsoft Excel for Android · Microsoft
16.0.0.0 before 16.0.19822.20190 · source: vendor
ML
Microsoft Loop for Android · Microsoft
1.0.0 before 16.0.19822.20190 · source: vendor
MO
Microsoft OneNote for Android · Microsoft
16.0.1 before 16.0.19822.20190 · source: vendor
MP
Microsoft PowerPoint for Android · Microsoft
16.0.0.0 before 16.0.19822.20190 · source: vendor
MW
Microsoft Word for Android · Microsoft
16.0.0.0 before 16.0.19822.20190 · source: vendor
3C
365 Copilot · Microsoft
before 16.0.19822.20190 · source: NVD
Affected product
M3
Microsoft 365 Copilot for Android
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41100
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41100
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100
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