CVE-2026-65789: Windows DNS Server Remote Code Execution Vulnerability
Published Aug 11, 2026
·Updated
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
20 affected componentsFixes available
Microsoft Windows Server 2022<10.0.20348.5499, <10.0.20348.5440
10.0.20348.549910.0.20348.5440
Microsoft Windows Server 2016<10.0.14393.9418
10.0.14393.9418
Microsoft Windows Server 2025<10.0.26100.33296, <10.0.26100.33222
10.0.26100.3329610.0.26100.33222
Microsoft Windows 10=1607
10.0.14393.9418
Microsoft Windows Server 2016<10.0.14393.9418
10.0.14393.9418
Microsoft Windows 10=1607
10.0.14393.9418
Microsoft Windows Server 2025<10.0.26100.33296, <10.0.26100.33222
10.0.26100.3329610.0.26100.33222
Microsoft Windows Server 2022<10.0.20348.5499, <10.0.20348.5440
10.0.20348.549910.0.20348.5440
Microsoft Windows Server 2019<10.0.17763.9121
10.0.17763.9121
Microsoft Windows 10=1809
10.0.17763.9121
Microsoft Windows Server 2019<10.0.17763.9121
10.0.17763.9121
Microsoft Windows 10=1809
10.0.17763.9121
Microsoft Windows 10 1607<10.0.14393.9418
Microsoft Windows 10 1607<10.0.14393.9418
Microsoft Windows 10 1809<10.0.17763.9121
Microsoft Windows 10 1809<10.0.17763.9121
Microsoft Windows Server 2016<10.0.14393.9418
Microsoft Windows Server 2019<10.0.17763.9121
Microsoft Windows Server 2022<10.0.20348.5440
Microsoft Windows Server 2025<10.0.26100.33222
Remediation
Event History
Aug 11, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:05 PM
Data Sourced
via MITRE·05:05 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-65789?
The severity of CVE-2026-65789 is rated high at 8.1.
2
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.
3
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.
4
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.
5
What can attackers do with CVE-2026-65789?
Attackers can exploit CVE-2026-65789 to execute arbitrary code on affected systems over the network.