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CVE-2025-20126— Cisco ThousandEyes Endpoint Agent Certificate Validation Vulnerability

Quick assessment

Affected
Cisco Cisco ThousandEyes Endpoint 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 Endpoint Agent是美国思科（Cisco）公司的一个端点代理程序。 Cisco ThousandEyes Endpoint Agent存在安全漏洞，该漏洞源于没有正确验证托管指标服务的证书。

CVSS 4.8 · Medium EPSS 0.17% · P7
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I. Basic Information for CVE-2025-20126

Vulnerability Information
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Vulnerability Title
Cisco ThousandEyes Endpoint Agent Certificate Validation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in certification validation routines of Cisco ThousandEyes Endpoint Agent for macOS and RoomOS could allow an unauthenticated, remote attacker to intercept or manipulate metrics information. This vulnerability exists because the affected software does not properly validate certificates for hosted metrics services. An on-path attacker could exploit this vulnerability by intercepting network traffic using a crafted certificate. A successful exploit could allow the attacker to masquerade as a trusted host and monitor or change communications between the remote metrics service and the vulnerable client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco ThousandEyes Endpoint Agent 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ThousandEyes Endpoint Agent是美国思科（Cisco）公司的一个端点代理程序。 Cisco ThousandEyes Endpoint Agent存在安全漏洞，该漏洞源于没有正确验证托管指标服务的证书。
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 Endpoint Agent 1.200 -

II. Public POCs for CVE-2025-20126

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III. Intelligence Information for CVE-2025-20126

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Vendor Advisories for CVE-2025-20126 (1)

Same Patch Batch · Cisco · 2025-01-08 · 5 CVEs total

CVE-2025-20166 5.4 MEDIUM Cisco Common Services Platform Collector Cross-Site Scripting Vulnerability
CVE-2025-20167 5.4 MEDIUM Cisco Common Services Platform Collector Cross-Site Scripting Vulnerability
CVE-2025-20168 5.4 MEDIUM Cisco Common Services Platform Collector Cross-Site Scripting Vulnerability
CVE-2025-20123 4.8 MEDIUM Cisco Crosswork Network Controller Stored Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco ThousandEyes Endpoint Agent
Same vendor: Cisco
Same weakness: CWE-295

V. Comments for CVE-2025-20126

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