Vulnerability Report

CVE-2025-14963

Title: Trellix Endpoint Security Input Validation Error

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2025-14963.

CWE Category CWE-20

Published Date Feb 24, 2026

Modified Date Feb 26, 2026

Exploit Status Not Found

Score 6.2 CVSS v4.0

Exploit Probability (EPSS)

0.11%

Vulnerability Summary

CVE-2025-14963: 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.

Impacted Vendors

Reference Links

https://thrive.trellix.com/s/article/000015100

CVSS v4.0

Source Entity [email protected]

Severity MEDIUM

6.2

Attack Vector

LOCAL

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.8