{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-84256", "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "state": "PUBLISHED", "assignerShortName": "OpenVPN", "dateReserved": "2026-09-01T13:36:26.707Z", "datePublished": "2026-09-07T07:55:27.465Z", "dateUpdated": "2026-10-13T22:25:00.499Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "shortName": "OpenVPN", "dateUpdated": "2026-10-13T22:25:00.499Z" }, "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-78", "description": "CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')", "type": "CWE" } ] }, { "descriptions": [ { "lang": "en", "cweId": "CWE-88", "description": "CWE-88 Improper neutralization of argument delimiters in a command ('argument injection')", "type": "CWE" } ] } ], "affected": [ { "vendor": "OpenVPN", "product": "OpenVPN", "platforms": [ "Windows" ], "versions": [ { "status": "affected", "version": "2.1_rc10", "lessThanOrEqual": "2.6.22", "versionType": "semver" }, { "status": "affected", "version": "2.7_alpha1", "lessThanOrEqual": "2.7.7", "versionType": "semver" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.7 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject" } ], "references": [ { "tags": [ "vendor-advisory" ], "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-84256" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } } ], "x_generator": { "engine": "cvelib 1.8.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-08T15:00:03.917148Z", "id": "CVE-2026-84256", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T15:00:15.389Z" } } ] } }