Cisco ThousandEyes Enterprise Agent up to 5.1.3 BrowserBot os command injection

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco ThousandEyes Enterprise Agent up to 5.1.3. It has been declared as critical. Affected is an unknown function of the component BrowserBot. The manipulation results in os command injection. This vulnerability is reported as CVE-2026-20206. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco ThousandEyes Enterprise Agent up to 5.1.3. It has been classified as critical. Affected is some unknown processing of the component BrowserBot. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is traded as CVE-2026-20206 since 10/08/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/23/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.3
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2025 CVE reserved
05/20/2026 +224 days Advisory disclosed
05/20/2026 +0 days VulDB entry created
07/23/2026 +64 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-tebbot-cmdinj-wN3yQ5gn
Status: Confirmed

CVE: CVE-2026-20206 (🔒)
GCVE (CVE): GCVE-0-2026-20206
GCVE (VulDB): GCVE-100-364902

Entryinfo

Created: 05/20/2026 18:43
Updated: 07/23/2026 18:45
Changes: 05/20/2026 18:43 (64), 07/23/2026 18:45 (1)
Complete: 🔍
Cache ID: 216::103

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