CVE-2026-88136 Web Distributed Authoring and Versioning (WEBDAV) Remote Code Execution Vulnerability
An authorized attacker can execute code over the network due to improper path equivalence resolution in Windows WebDAV.
- 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-2026-88136?
CVE-2026-88136 is a high-severity path traversal vulnerability in Microsoft Windows 10 Version 1607, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper resolution of path equivalence in WebDAV allows an authorized attacker to execute code over a network.
Weakness: CWE-41
Which versions are affected by CVE-2026-88136?
How do I fix CVE-2026-88136?
No fix has been published for CVE-2026-88136 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-2026-88136 being exploited?
There is no known exploitation of CVE-2026-88136 in the wild and no public exploit code.
Sources
Also known as GHSA-3xw4-x86f-w6gw.