CVE-2025-20126: roomos Cert Validation Flaw — Fix

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.

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CVSS v3.1 Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor	Product	Versions
cisco	thousandeyes_endpoint_agent	< 1.206.3
apple	macos	All
cisco	thousandeyes_endpoint_agent	< 1.207.2
cisco	roomos	All

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-thousandeyes-cert-pqtJUv9N

Frequently Asked Questions

What is CVE-2025-20126? +

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. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2025-20126? +

CVE-2025-20126 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20126? +

CVE-2025-20126 affects products from apple, cisco, specifically: macos, roomos, thousandeyes_endpoint_agent. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20126? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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