CVE-2026-20161 Cisco ThousandEyes Enterprise Agent Arbitrary File Overwrite Vulnerability
An authenticated local attacker can overwrite arbitrary files on the system by exploiting improper access controls and symbolic links.
- 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-2026-20161?
CVE-2026-20161 is a medium-severity path traversal vulnerability in Cisco ThousandEyes Enterprise Agent, published on 15 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the CLI of Cisco ThousandEyes Enterprise Agent could allow an authenticated, local attacker with low privileges to overwrite arbitrary files on the local system of an affected device. This vulnerability is due to improper access controls on files that are on the local file system of an affected device. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to bypass file system permissions and overwrite arbitrary files on the affected device.
Weakness: CWE-59
Which versions are affected by CVE-2026-20161?
How do I fix CVE-2026-20161?
No fix has been published for CVE-2026-20161 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-2026-20161 being exploited?
There is no known exploitation of CVE-2026-20161 in the wild and no public exploit code.
Sources
Also known as GHSA-rpqw-j963-73gh.