CVE-2025-59287 CRITICAL

CVE-2025-59287: Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

Vendor Microsoft
Product Windows Server 2012
Weakness CWE-502 · Unsafe deserialization
KEV Status Known Exploited
Published October 14, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

CISA mandated remediation

02CISA Required Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Key dates

03Disclosure timeline

October 14, 2025 CVE published
February 26, 2026 Record updated