MSRC-CVE-2026-122979 — Microsoft Teams for Android Spoofing Vulnerability

Summary

Impact: Spoofing. Microsoft rating: Important. Not known to be exploited. Customer action: Required.

Details

How could an attacker exploit this vulnerability?
An attacker could persuade a user or administrator to install a malicious agent. When the affected application synchronizes that agent, the attacker could obtain a Teams session token and act as the affected user within the token's permissions.

Vulnerabilities 1

High 8.1

CVE-2026-122979

Microsoft Teams for Android Spoofing Vulnerability

Improper control of generation of code ('code injection') in Microsoft Teams for Android allows an unauthorized attacker to perform spoofing over a network.

Microsoft Microsoft Teams for Android Android

Nov 10, 2026

Revision history

2026-11-10 #1
Information published.

References

CVE-2026-122979 Microsoft Teams for Android Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122979
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss