CVE-2026-20206
Cisco ThousandEyes BrowserBot Command Injection Vulnerability
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.
INFO
Published Date :
May 20, 2026, 5:16 p.m.
Last Modified :
July 23, 2026, 12:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-20206
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- No customer action needed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20206.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tebbot-cmdinj-wN3yQ5gn |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20206 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20206
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20206 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-20206 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: Cisco ThousandEyes Enterprise Agent, Description: Una vulnerabilidad en el componente BrowserBot de Cisco ThousandEyes Enterprise Agent podría haber permitido a un atacante remoto autenticado ejecutar comandos arbitrarios en los Agents en nombre del proceso de orquestación de sintéticos de BrowserBot. Cisco ha abordado esta vulnerabilidad en el Cisco ThousandEyes Enterprise Agent, y no se requiere ninguna acción por parte del cliente. Esta vulnerabilidad se debía a una validación de entrada insuficiente de los argumentos de comando que son proporcionados por el usuario. Antes de que esta vulnerabilidad fuera abordada, un atacante podría haber explotado esta vulnerabilidad autenticándose en el ThousandEyes SaaS y enviando una entrada manipulada en el parámetro afectado. Un exploit exitoso podría haber permitido al atacante ejecutar comandos arbitrarios dentro del contenedor BrowserBot como el usuario 'node'. Para explotar esta vulnerabilidad, el atacante debe tener credenciales de usuario válidas para el ThousandEyes SaaS y la capacidad de gestionar pruebas de transacciones. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Cisco', 'product': 'Cisco ThousandEyes Enterprise Agent', 'versions': [{'status': 'affected', 'version': 'Agent 5.0'}, {'status': 'affected', 'version': 'Agent 4.4.4'}, {'status': 'affected', 'version': 'Agent 4.4.3'}, {'status': 'affected', 'version': 'Agent 4.4.2'}, {'status': 'affected', 'version': 'Agent 4.2'}, {'status': 'affected', 'version': 'Agent 4.1'}, {'status': 'affected', 'version': 'Agent 4.0'}, {'status': 'affected', 'version': 'Agent 5.1'}, {'status': 'affected', 'version': 'Agent 5.1.2'}, {'status': 'affected', 'version': 'Agent 5.1.3'}], 'defaultStatus': 'unknown'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-20206', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-21T03:55:35.778187Z'} -
New CVE Received by [email protected]
May. 20, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CWE CWE-78 Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tebbot-cmdinj-wN3yQ5gn