CVE-2026-70161 .NET Elevation of Privilege Vulnerability
An authorized local attacker can exploit a path traversal flaw in .NET to elevate privileges on the system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-70161?
CVE-2026-70161 is a high-severity path traversal vulnerability in Microsoft .NET 10.0 runtime, published on 13 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Improper limitation of a pathname to a restricted directory ('path traversal') in .NET allows an authorized attacker to elevate privileges locally.
Weakness: CWE-22
Which versions are affected by CVE-2026-70161?
How do I fix CVE-2026-70161?
No fix has been published for CVE-2026-70161 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-2026-70161 being exploited?
There is no known exploitation of CVE-2026-70161 in the wild and no public exploit code.
Sources
Also known as UBUNTU-CVE-2026-70161.