CVE-2026-65789: Windows DNS Server Remote Code Execution Vulnerability
Use after free in Windows DNS allows an unauthorized 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 10.0.20348.5499Fixed 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 - 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 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228
Event History
Frequently Asked Questions
What is the severity of CVE-2026-65789?
The severity of CVE-2026-65789 is rated high at 8.1.
How do I fix CVE-2026-65789?
To fix CVE-2026-65789, apply the latest security updates provided by Microsoft for your Windows operating system.
What systems are affected by CVE-2026-65789?
CVE-2026-65789 affects Microsoft Windows 10, Windows Server 2022, Windows Server 2016, Windows Server 2019, and Windows Server 2025.
What is the nature of the vulnerability in CVE-2026-65789?
CVE-2026-65789 is a use after free vulnerability that allows unauthorized remote code execution.
What can attackers do with CVE-2026-65789?
Attackers can exploit CVE-2026-65789 to execute arbitrary code on affected systems over the network.