Active Exploitation of Critical Windows Server Update Service Vulnerability

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Source: Unit 42
Active Exploitation of Critical Windows Server Update Service Vulnerability
Photo: Unit 42
TL;DR Summary

A critical remote code execution vulnerability in Microsoft WSUS (CVE-2025-59287) was actively exploited in the wild shortly after an emergency patch was released. The flaw allows unauthenticated attackers to execute arbitrary code on affected servers, primarily impacting systems with the WSUS role enabled. Microsoft recommends immediate patching or applying workarounds such as disabling the WSUS role or blocking high-risk ports to mitigate the risk.

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