CVE-2025-59287

Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability

Microsoft — Windows

Added to KEV catalog: 24 October 2025
Federal remediation due date: 14 November 2025
Weakness classification (CWE): CWE-502

CISA Description

Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution.

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.

Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-59287 ; https://nvd.nist.gov/vuln/detail/CVE-2025-59287

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