CVE-2025-14963
7.8 · HIGHOverview
CVE-2025-14963 is a high-severity vulnerability affecting trellix endpoint_security. It was published on February 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from trellix. Update endpoint_security to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| trellix | endpoint_security | 30.0.0 | Affected |
References
Frequently Asked Questions
What is CVE-2025-14963?
CVE-2025-14963 is a high-severity vulnerability affecting trellix endpoint_security. It was published on February 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2025-14963?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-14963?
Check the references section for vendor advisories and patches from trellix. Update endpoint_security to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-14963?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-14963 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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