CVE-2025-20259 Cisco ThousandEyes Endpoint Agent for Windows Arbitrary File Write Vulnerability
A local authenticated attacker can delete arbitrary files via symbolic link manipulation during agent upgrades, requiring a patch.
- 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-2025-20259?
CVE-2025-20259 is a medium-severity path traversal vulnerability in Cisco ThousandEyes Endpoint Agent, published on 4 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple vulnerabilities in the update process of Cisco ThousandEyes Endpoint Agent for Windows could allow an authenticated, local attacker to delete arbitrary files on an affected device. These vulnerabilities are due to improper access controls on files that are in the local file system. An attacker could exploit these vulnerabilities by using a symbolic link to perform an agent upgrade that redirects the delete operation of any protected file. A successful exploit could allow the attacker to delete arbitrary files from the file system of the affected device.
Weakness: CWE-22
Which versions are affected by CVE-2025-20259?
It affects 1 product.
Products include Cisco Thousandeyes Endpoint Agent.
How do I fix CVE-2025-20259?
No fix has been published for CVE-2025-20259 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-2025-20259 being exploited?
There is no known exploitation of CVE-2025-20259 in the wild and no public exploit code.
Other vulnerabilities in Cisco ThousandEyes Endpoint Agent
Sources
Also known as GHSA-cxp3-3gvr-5g69.