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CVE-2026-50487: Windows DNS Client Elevation of Privilege Vulnerability

highCVSS 8.1CVE-2026-50487
Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows DNSPrivilege escalation
What
Use after free vulnerability allows unauthorized attackers to elevate privileges over a network.
Who is affected
All deployments using Microsoft Windows DNS.
Urgency
Remediation is urgent due to the high severity of the privilege escalation vulnerability.
Action
Apply the latest security updates for Windows DNS.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.1
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50487

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-2026-50487coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows DNS Client

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