Vulnerability · Published Apr 15, 2026 · Assigned by cisco
CVE-2026-20161Cisco ThousandEyes Enterprise Agent Arbitrary File Overwrite Vulnerability
Medium 5.5
In plain English
A medium-severity security flaw in Cisco ThousandEyes Enterprise Agent from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco ThousandEyes Enterprise Agent | Agent 5.0Agent 4.4.4Agent 4.4.3Agent 4.4.2Agent 4.2Agent 4.1Agent 4.0Agent 5.1 |
Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N