CVE-2026-70167 Windows Domain Name Service Remote Code Execution Vulnerability
An authorized attacker can execute code remotely on Windows DNS Server via a type confusion vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70167?
CVE-2026-70167 is a high-severity memory corruption vulnerability in Microsoft Windows Server 2022, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Access of resource using incompatible type ('type confusion') in DNS Server allows an authorized attacker to execute code over a network.
Which versions are affected by CVE-2026-70167?
It affects 2 products.
Products include Microsoft Windows Server 2022, Microsoft Windows Server 2025.
How do I fix CVE-2026-70167?
No fix has been published for CVE-2026-70167 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-70167 being exploited?
There is no known exploitation of CVE-2026-70167 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2022
- CVE-2022-34715 Windows Network File System Remote Code Execution Vulnerability
- CVE-2025-50171 Remote Desktop Spoofing Vulnerability
- CVE-2026-45648 Windows Active Directory Domain Services Remote Code Execution Vulnerability
- CVE-2024-30064 Windows Kernel Elevation of Privilege Vulnerability
- CVE-2026-69858 Windows DNS Server Remote Code Execution Vulnerability
Sources
Also known as GHSA-m7j9-9j6g-vg2m.