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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://thrive.trellix.com/s/article/000015100	Permissions Required

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:trellix:endpoint_security::::::::
	cpe:2.3:a:trellix:endpoint_security:35.31.0-37:::::::*
	cpe:2.3:a:trellix:endpoint_security:36.30.0-17:::::::*

History

26 Feb 2026, 18:39

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
First Time		Trellix Trellix endpoint Security
CWE		NVD-CWE-noinfo
References	~~() https://thrive.trellix.com/s/article/000015100 -~~	() https://thrive.trellix.com/s/article/000015100 - Permissions Required
CPE		cpe:2.3:a:trellix:endpoint_security:36.30.0-17:::::::* cpe:2.3:a:trellix:endpoint_security:35.31.0-37:::::::* cpe:2.3:a:trellix:endpoint_security::::::::

26 Feb 2026, 08:16

Type	Values Removed	Values Added
Summary	(en) A vulnerability identified in the Trellix 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; a driver file associated with Trellix HX Agent (used in all existing HX Agent versions). The vulnerable driver installed in a product or a system running 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.	(en) 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.

24 Feb 2026, 18:29

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-24 18:29

Updated : 2026-02-26 18:39

NVD link : CVE-2025-14963

Mitre link : CVE-2025-14963

CVE.ORG link : CVE-2025-14963

JSON object : View

Products Affected

trellix

endpoint_security

CWE

CWE-20

Improper Input Validation

NVD-CWE-noinfo

7.8 /10