Medium [CVE-2026-20206] Cisco ThousandEyes Enterprise Agent BrowserBot Command Injection Vulnerability
This medium-severity Cisco advisory covers CVE-2026-20206; related products: ThousandEyes Enterprise Agent.
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Summary
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.
There are no workarounds that address this vulnerability.
- Scope: This vulnerability affects Cisco ThousandEyes BrowserBot, which is cloud based.
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
Mitigation checklist
- As mentioned, Cisco has addressed this vulnerability in the ThousandEyes service, and no customer action is necessary to update on-premises software or devices.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
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