What is CVE-2026-62896?

CVE-2026-62896 is a critical-severity vulnerability in Microsoft Teams, classified under Improper Authentication. CVSS score: 9.6/10. Published 2026-08-07.

How severe is CVE-2026-62896?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Auth bypass in Microsoft Teams

CVE-2026-62896

Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Microsoft Teams
Microsoft Teams

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2026-62896?: CVE-2026-62896 is a critical-severity vulnerability in Microsoft Teams, classified under Improper Authentication. CVSS score: 9.6/10. Published 2026-08-07.
How severe is CVE-2026-62896?: Critical severity. CVSS v3 base score is 9.6 out of 10.