Advisory severityMedium5.5Cisco

Medium [CVE-2026-20161] Cisco ThousandEyes Enterprise Agent Arbitrary File Overwrite Vulnerability

This medium-severity Cisco advisory covers CVE-2026-20161; related products: ThousandEyes Enterprise Agent.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

cisco-sa-te-agentfilewrite-tqUw3SMU Source published Apr 15, 2026Source updated Apr 15, 2026

VulniPulse record published Jul 5, 2026Record updated Jul 31, 2026

CVE-2026-20161

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Summary

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.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Affected versions

Scope: At the time of publication, this vulnerability affected Cisco ThousandEyes Enterprise Agent Linux Package installation type, regardless of device configuration.
Release 1.2 and earlier (first fixed: 1.234.0)

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Fixed versions

1.234.0

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
Release 1.2 and earlier: upgrade to 1.234.0.

Workaround status

There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Discussion(0)

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