CVE-2025-21343 HIGH

CVE-2025-21343: Windows Web Threat Defense User Service Information Disclosure Vulnerability

Vendor Microsoft
Product Windows 11 version 22H2
Weakness CWE-269
Published January 14, 2025
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Windows Web Threat Defense User Service Information Disclosure Vulnerability

Key dates

02Disclosure timeline

January 14, 2025 CVE published
June 9, 2026 Record updated