CVE-2026-26154 HIGH

CVE-2026-26154: Windows Server Update Service (WSUS) Tampering Vulnerability

Vendor Microsoft
Product Windows Server 2012
Weakness CWE-20 · Input validation
Published April 14, 2026
Last update June 1, 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 None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.

Key dates

02Disclosure timeline

April 14, 2026 CVE published
June 1, 2026 Record updated