CVE-2025-20126

Cisco ThousandEyes Endpoint Agent Certificate Validation Vulnerability

MEDIUM
4.8
CVSS Score
Published: January 8, 2025 at 04:09 PM UTC
Updated: June 17, 2026 at 08:40 AM UTC
2 products affected across 1 vendorThousandeyes Endpoint AgentRoomos· also runs on 1 platform

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.206.3v < 1.207.21.200
Affected range stops below 1.206.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.207.2, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · cisco-roomos (environment)
All versions

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMcisco
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-295

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