CVE-2026-69551: Windows DNS Server Remote Code Execution Vulnerability
Use after free 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 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must be authorized and have low privileges. Exploitation can be performed over the network and does not require user interaction.
What is the potential impact of successful exploitation?
Successful exploitation could allow code execution with high impact to confidentiality, integrity, and availability.
Which systems should be prioritized for review?
Prioritize systems running Windows DNS Server on the listed Microsoft Windows 10, Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 platforms, particularly where low-privileged authorized users can reach the DNS service over the network.