What is CVE 2025 59287 ?

CVE-2025-59287 is a critical WSUS remote code execution (RCE) vulnerability that allows attackers to take over vulnerable Windows Server Update Services instances without authentication. With a CVSS score of 9.8, the flaw exploits unsafe deserialization, enabling remote attackers to execute arbitrary code with high impact.

Because WSUS is a core component of enterprise patching, a successful exploit can compromise update infrastructure, disrupt operations, and potentially spread malicious updates across managed systems. Active exploitation has already been observed, and CISA has added this CVE to its Known Exploited Vulnerabilities (KEV) catalog.

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