CVE-2026-85827 WebDAV Elevation of Privilege Vulnerability
A heap-based buffer overflow in Windows WebDAV allows an authorized local attacker to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85827?
CVE-2026-85827 is a high-severity memory corruption vulnerability in Microsoft Windows 10 Version 1607, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Heap-based buffer overflow in WebDAV allows an authorized attacker to elevate privileges locally.
Weakness: CWE-122
Which versions are affected by CVE-2026-85827?
How do I fix CVE-2026-85827?
No fix has been published for CVE-2026-85827 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-2026-85827 being exploited?
There is no known exploitation of CVE-2026-85827 in the wild and no public exploit code.
Sources
Also known as GHSA-4r8h-mjmv-hjr6.