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CVE-2026-61920: Windows DNS Server Remote Code Execution Vulnerability

mediumCVSS 6.6CVE-2026-61920
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an authorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows DNS ServerRemote code execution
What
Race condition in DNS Server allows an authorized attacker to execute code over the network.
Who is affected
Authorized users or network-connected attackers targeting Windows DNS Server deployments.
Urgency
Medium; network-reachable code execution with CVSS 6.6 and no current exploitation.
Action
Apply the latest Windows security update addressing CVE-2026-61920.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 6.6
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61920

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-2026-61920coverage & 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 Server

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