CVE-2025-59287: Microsoft Windows Server Update Service (WSUS)

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

• CISA KEV-listed (remediation due 2025-11-14)
• EPSS 100.0% (100.0% percentile)
• CVSS 9.8 critical

Detection rules

• Exploitation Activity of CVE-2025-59287 - WSUS Suspicious Child Process high
• Exploitation Activity of CVE-2025-59287 - WSUS Deserialization high
• DNS Query to External Service Interaction Domains high

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Read the full analysis on IntelFusions