Cisco ThousandEyes BrowserBot Command Injection Vulnerability
Summary
| CVE | CVE-2026-20206 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-20 17:16:20 UTC |
| Updated | 2026-05-20 17:30:40 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS: 0.001210000 probability, percentile 0.306960000 (date 2026-05-27)
Problem Types: CWE-78 | CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 6.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| 3.1 | CNA | CVSSV3_1 | 6.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
LowCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 5.0 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.4.4 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.4.3 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.4.2 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.2 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.1 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 4.0 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 5.1 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 5.1.2 | Not specified |
| CNA | Cisco | Cisco ThousandEyes Enterprise Agent | affected Agent 5.1.3 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tebbot... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
There are currently no legacy QID mappings associated with this CVE.