CVE-2026-21535 HIGH

CVE-2026-21535: Microsoft Teams Information Disclosure Vulnerability

Vendor Microsoft
Product Microsoft Teams
Weakness CWE-284
Published February 19, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.

Key dates

02Disclosure timeline

February 19, 2026 CVE published
May 11, 2026 Record updated