CVE-2025-20126 Cisco ThousandEyes Endpoint Agent Certificate Validation Vulnerability
An on-path attacker can intercept or manipulate metrics data by bypassing certificate validation in the Cisco ThousandEyes Endpoint Agent.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-20126?
CVE-2025-20126 is a medium-severity vulnerability in Cisco ThousandEyes Endpoint Agent, published on 8 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2025-20126?
It affects 1 product.
Products include Cisco Thousandeyes Endpoint Agent.
How do I fix CVE-2025-20126?
No fix has been published for CVE-2025-20126 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-20126 being exploited?
There is no known exploitation of CVE-2025-20126 in the wild and no public exploit code.
Other vulnerabilities in Cisco ThousandEyes Endpoint Agent
Sources
Also known as GHSA-jwc2-hj9w-9cff.