---
id: CVE-2026-20350
title: "A vulnerability in the web-based management interface of Cisco ThousandEyes Virtual Appliance could allow an authenticated, remote attacker to inject arbitrary operating system commands.\r\n\r\nThis vulnerability is due to improper validatio…"
summary: "A vulnerability in the web-based management interface of Cisco ThousandEyes Virtual Appliance could allow an authenticated, remote attacker to inject arbitrary operating system commands.\r\n\r\nThis vulnerability is due to improper validatio…"
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-78
vendor: Cisco
product: Cisco ThousandEyes Enterprise Agent
affected:
  - thousandeyes_enterprise_agent Agent 5.0
  - thousandeyes_enterprise_agent Agent 4.4.4
  - thousandeyes_enterprise_agent Agent 4.4.3
  - thousandeyes_enterprise_agent Agent 4.4.2
  - thousandeyes_enterprise_agent Agent 4.2
  - thousandeyes_enterprise_agent Agent 4.1
  - thousandeyes_enterprise_agent Agent 4.0
  - thousandeyes_enterprise_agent Agent 5.1
  - thousandeyes_enterprise_agent Agent 5.1.2
  - thousandeyes_enterprise_agent Agent 5.1.3
  - thousandeyes_enterprise_agent Agent 5.2.0
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T15:17:07.710'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20350'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-teva-os-command-W4GAO6jp
    label: psirt@cisco.com
  - url: 'https://software.cisco.com'
tags:
  - nvd
  - cve.org
  - csaf
  - vendor-advisory
  - cisco
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T03:56:09.748261Z'
epss: 0.00345
epssPercentile: 0.25486
ingestedAt: '2026-09-16T16:37:52.181Z'
---

## Overview

A vulnerability in the web-based management interface of Cisco ThousandEyes Virtual Appliance could allow an authenticated, remote attacker to inject arbitrary operating system commands.

This vulnerability is due to improper validation of user-supplied input to the web-based management interface. An attacker could exploit this vulnerability by saving configuration details that contain malicious values. A successful exploit could allow the attacker to execute arbitrary operating system commands with root privileges. To exploit this vulnerability, the attacker must have valid administrative credentials.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **cisco-sa-teva-os-command-W4GAO6jp** · Cisco · affected: Cisco ThousandEyes Enterprise Agent, Cisco ThousandEyes Endpoint Agent · updated 2026-09-16 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-teva-os-command-W4GAO6jp)