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CVE-2026-50328: Windows Server Update Service (WSUS) Tampering Vulnerability

highCVSS 7.5CVE-2026-50328
Uncaught exception in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows Server Update ServiceOther
What
Uncaught exception in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
Who is affected
Users of Windows Server Update Service are affected.
Urgency
Remediation is urgent due to the high severity and potential for network tampering.
Action
Apply the latest security patch for Windows Server Update Service.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.5
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50328

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-50328coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Server Update

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center