CVE-2026-70127: Windows Domain Name Service Remote Code Execution Vulnerability
Use after free in DNS Server allows an unauthorized attacker to execute code over a network.
Other sources
Windows Domain Name Service 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 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The attacker can attempt exploitation remotely over the network and does not need prior privileges or user interaction. Exploitation has high attack complexity.
What is the potential impact if exploitation succeeds?
Successful exploitation can result in remote code execution. The published vector rates confidentiality, integrity, and availability impact as high, with scope unchanged.
Which Windows products are identified as affected?
The affected software list includes Microsoft Windows 10 and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025. The issue is associated with DNS Server.