CVE-2025-20259: thousandeyes Path Traversal — Fix

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
cisco	thousandeyes_endpoint_agent	< 2.3.3
microsoft	windows	All

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-te-endagent-filewrt-zNcDqNRJ

Frequently Asked Questions

What is CVE-2025-20259? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-20259? +

CVE-2025-20259 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20259? +

CVE-2025-20259 affects products from cisco, microsoft, specifically: thousandeyes_endpoint_agent, windows. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20259? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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