Vulnerability · Published Feb 24, 2026 · Assigned by trellix
CVE-2025-14963
Medium 6.2
In plain English
A medium-severity improper input validation in Endpoint HX Agent (xAgent) from Trellix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
A vulnerability identified in the HX Agent driver file fekern.sys allowed a threat actor with local user access the ability to gain elevated system privileges. Utilization of a Bring Your Own Vulnerable Driver (BYOVD) was leveraged to gain access to the critical Windows process memory lsass.exe (Local Security Authority Subsystem Service). The fekern.sys is a driver file associated with the HX Agent (used in all existing HX Agent versions). The vulnerable driver installed in a product or a system running a fully functional HX Agent is, itself, not exploitable as the product’s tamper protection restricts the ability to communicate with the driver to only the Agent’s processes.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Trellix | Endpoint HX Agent (xAgent) | 36.30.0-17, 35.31.0-37, 34.x, 33.x and 30.x |
Weakness: CWE-20 · Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P