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CVE-2026-20206— Cisco ThousandEyes BrowserBot Command Injection Vulnerability

Quick assessment

Affected
Cisco Cisco ThousandEyes Enterprise Agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco ThousandEyes Enterprise Agent是美国思科（Cisco）公司的一个应用程序。提供了扩展的可视性、自动化的见解和无缝的工作流程。 Cisco ThousandEyes Enterprise Agent存在操作系统命令注入漏洞，该漏洞源于BrowserBot组件中命令参数输入验证不足，可能导致认证远程攻击者以节点用户身份执行任意命令。

CVSS 6.3 · Medium EPSS 0.42% · P34

Affected Version Matrix 10

VendorProduct Version RangeStatus
Cisco Cisco ThousandEyes Enterprise Agent Agent 5.0 affected
Agent 4.4.4 affected
Agent 4.4.3 affected
Agent 4.4.2 affected
Agent 4.2 affected
Agent 4.1 affected
Agent 4.0 affected
Agent 5.1 affected
… +2 more rows
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I. Basic Information for CVE-2026-20206

Vulnerability Information
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Vulnerability Title
Cisco ThousandEyes BrowserBot Command Injection Vulnerability
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco ThousandEyes Enterprise Agent 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ThousandEyes Enterprise Agent是美国思科（Cisco）公司的一个应用程序。提供了扩展的可视性、自动化的见解和无缝的工作流程。 Cisco ThousandEyes Enterprise Agent存在操作系统命令注入漏洞，该漏洞源于BrowserBot组件中命令参数输入验证不足，可能导致认证远程攻击者以节点用户身份执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco ThousandEyes Enterprise Agent Agent 5.0 -

II. Public POCs for CVE-2026-20206

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III. Intelligence Information for CVE-2026-20206

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Vendor Advisories for CVE-2026-20206 (1)

Same Patch Batch · Cisco · 2026-05-20 · 4 CVEs total

CVE-2026-20223 10.0 CRITICAL Cisco Secure Workload Unauthorized API Access Vulnerability
CVE-2026-20171 6.8 MEDIUM Cisco Nexus 3000 and 9000 Series Border Gateway Protocol Denial of Service Vulnerability
CVE-2026-20199 4.7 MEDIUM Cisco ThousandEyes Virtual Appliance 注入漏洞

IV. Related Vulnerabilities

Same product: Cisco ThousandEyes Enterprise Agent
Same vendor: Cisco
Same weakness: CWE-78

V. Comments for CVE-2026-20206

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