What is CVE-2026-69559?

CVE-2026-69559 is a medium-severity vulnerability in Microsoft Teams For Android, classified under Origin Validation Error. CVSS score: 5.8/10. Published 2026-09-08.

How severe is CVE-2026-69559?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Microsoft Teams For Android

CVE-2026-69559

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N.

Affected products

Microsoft Teams For Android

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-69559?: CVE-2026-69559 is a medium-severity vulnerability in Microsoft Teams For Android, classified under Origin Validation Error. CVSS score: 5.8/10. Published 2026-09-08.
How severe is CVE-2026-69559?: Medium severity. CVSS v3 base score is 5.8 out of 10.