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CVE-2026-20206: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Cisco Cisco ThousandEyes Enterprise Agent

0
Medium
VulnerabilityCVE-2026-20206cvecve-2026-20206
Published: Wed May 20 2026 (05/20/2026, 16:06:32 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco ThousandEyes Enterprise Agent

Description

A vulnerability in the BrowserBot component of Cisco ThousandEyes Enterprise Agent could have allowed an authenticated, remote attacker to execute arbitrary commands on Agents on behalf of the BrowserBot synthetics orchestration process. Cisco has addressed this vulnerability in the Cisco ThousandEyes Enterprise Agent, and no customer action is needed. This vulnerability was due to insufficient input validation of command arguments that are supplied by the user. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by authenticating to the ThousandEyes SaaS and submitting crafted input into the affected parameter. A successful exploit could have allowed the attacker to execute arbitrary commands within the BrowserBot container as the node user. To exploit this vulnerability, the attacker must have valid user credentials for the ThousandEyes SaaS and the ability to manage transaction tests.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 05/20/2026, 16:49:41 UTC

Technical Analysis

This vulnerability in Cisco ThousandEyes Enterprise Agent's BrowserBot component involves improper neutralization of special elements used in OS commands, enabling OS command injection. An authenticated attacker with valid ThousandEyes SaaS credentials could submit crafted input to execute arbitrary commands within the BrowserBot container as the node user. The root cause is insufficient input validation of command arguments. Cisco has fixed this issue in the product, and no customer action is necessary. The vulnerability affects multiple agent versions including 4.0 through 5.1.3.

Potential Impact

Successful exploitation allows an authenticated attacker to execute arbitrary OS commands on the ThousandEyes Enterprise Agent node with node user privileges. This could lead to limited confidentiality, integrity, and availability impacts on the affected system. However, exploitation requires valid user credentials and permissions to manage transaction tests, limiting the attack surface. No known exploits in the wild have been reported.

Mitigation Recommendations

Cisco has addressed this vulnerability in the ThousandEyes Enterprise Agent, and no customer action is needed. Customers should ensure they are running a fixed version of the agent. Since the vendor advisory states no action is required, no additional mitigations are recommended.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.397Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a0de26bba1db473628f2739

Added to database: 5/20/2026, 4:33:47 PM

Last enriched: 5/20/2026, 4:49:41 PM

Last updated: 5/20/2026, 6:42:11 PM

Views: 3

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