CVE-2026-50426 Windows DNS Server Remote Code Execution Vulnerability
An authorized attacker can execute code on Windows DNS Server via relative path traversal over an adjacent network.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50426?
CVE-2026-50426 is a medium-severity path traversal vulnerability in Microsoft Windows 10 1607, published on 14 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Relative path traversal in DNS Server allows an authorized attacker to execute code over an adjacent network.
Weakness: CWE-23
Which versions are affected by CVE-2026-50426?
It affects 7 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022 and 1 more.
How do I fix CVE-2026-50426?
No fix has been published for CVE-2026-50426 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-50426 being exploited?
There is no known exploitation of CVE-2026-50426 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
Sources
Also known as GHSA-8489-g9w2-ccx7.