Windows
CVE-2025-14963
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS 7.8 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via local access. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
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. [CVSS 7.8 HIGH]
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Technical ContextAI · show details
Classified as CWE-20 (Improper Input Validation). Affects Endpoint Security. 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 syste
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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.
Executive ViewAI
CVE-2025-14963 is a local privilege escalation vulnerability in HX Agent's fekern.sys driver that allows authenticated users to gain system-level access. This poses a significant risk to organizations where internal users or compromised accounts could escalate privileges to deploy malware, exfiltrate data, or disable security controls.
Restrict local administrative access and enforce principle of least privilege; implement kernel driver signing enforcement (SecureBoot/UEFI Secure Boot); deploy endpoint detection and response (EDR) solutions to monitor for abnormal process elevation; consider disabling or uninstalling HX Agent if operationally feasible; segment networks to limit lateral movement post-privilege escalation; apply audit logging to detect privilege escalation attempts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
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SSVC AssessmentENISA
Priority Score
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB