{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-14963", "assignerOrgId": "01626437-bf8f-4d1c-912a-893b5eb04808", "state": "PUBLISHED", "assignerShortName": "trellix", "dateReserved": "2025-12-19T10:32:38.416Z", "datePublished": "2026-02-24T17:11:06.812Z", "dateUpdated": "2026-02-24T17:11:06.812Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Endpoint HX Agent (xAgent)", "vendor": "Trellix", "versions": [{"status": "affected", "version": "36.30.0-17, 35.31.0-37, 34.x, 33.x and 30.x"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">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</span><span style=\"background-color: rgb(255, 255, 255);\"> fekern.sys; </span><span style=\"background-color: rgb(255, 255, 255);\">a driver file associated with Trellix HX Agent (used in all existing HX Agent versions). &nbsp; The vulnerable driver installed in a product or a system running fully functional HX Agent is, itself, not exploitable</span> <span style=\"background-color: rgb(255, 255, 255);\">as the product\u2019s tamper protection restricts the ability to communicate with the driver to only the agent\u2019s processes.</span><br>"}], "value": "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). \u00a0 The vulnerable driver installed in a product or a system running fully functional HX Agent is, itself, not exploitable as the product\u2019s tamper protection restricts the ability to communicate with the driver to only the agent\u2019s processes."}], "impacts": [{"capecId": "CAPEC-30", "descriptions": [{"lang": "en", "value": "CAPEC-30: Hijacking a Privileged Thread of Execution"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "baseScore": 6.2, "baseSeverity": "MEDIUM", "exploitMaturity": "PROOF_OF_CONCEPT", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "description": "CWE-20 Improper Input Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "01626437-bf8f-4d1c-912a-893b5eb04808", "shortName": "trellix", "dateUpdated": "2026-02-24T17:11:06.812Z"}, "references": [{"url": "https://thrive.trellix.com/s/article/000015100"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 0.5.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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). \u00a0 The vulnerable driver installed in a product or a system running fully functional HX Agent is, itself, not exploitable as the product\u2019s tamper protection restricts the ability to communicate with the driver to only the agent\u2019s processes."}], "id": "CVE-2025-14963", "lastModified": "2026-02-24T18:29:32.613", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.2, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "trellixpsirt@trellix.com", "type": "Secondary"}]}, "published": "2026-02-24T18:29:32.613", "references": [{"source": "trellixpsirt@trellix.com", "url": "https://thrive.trellix.com/s/article/000015100"}], "sourceIdentifier": "trellixpsirt@trellix.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "trellixpsirt@trellix.com", "type": "Primary"}]}

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