CVE-2026-61920: Windows DNS Server Remote Code Execution Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an authorized attacker to execute code over a network.
Other sources
Windows DNS Server Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23337Patch KB5120386 - Upgrade
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Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
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Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238
Event History
Frequently Asked Questions
What is the severity of CVE-2026-61920?
The severity of CVE-2026-61920 is medium with a score of 6.6.
How do I fix CVE-2026-61920?
To fix CVE-2026-61920, apply the latest security updates provided by Microsoft for affected Windows versions.
What software is affected by CVE-2026-61920?
CVE-2026-61920 affects Microsoft Windows 10, Windows 11, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.
What type of vulnerability is CVE-2026-61920?
CVE-2026-61920 is a race condition vulnerability that allows remote code execution.
What can an attacker do with CVE-2026-61920?
An authorized attacker can exploit CVE-2026-61920 to execute arbitrary code remotely over a network.