{"id":"CVE-2026-84256","title":"An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject","summary":"An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject","severity":"high","cvss":7.7,"cvssVector":"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","cwe":["CWE-78","CWE-88"],"vendor":"OpenVPN","product":"OpenVPN","affected":["OpenVPN >= 2.1_rc10 <= 2.6.22","OpenVPN >= 2.7_alpha1 <= 2.7.6"],"published":"2026-09-07","updated":"2026-09-08","sourceUpdated":"2026-09-08T19:07:52.113","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84256","references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-84256","label":"security@openvpn.net"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84256.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84256"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84256"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84256"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00383,"epssPercentile":0.32103,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-08T15:00:03.917148Z"},"cvssSource":"cna","scores":{"cna":7.7,"vendor":8.8},"ingestedAt":"2026-09-08T15:33:26.975Z","slug":"CVE-2026-84256","body":"## Overview\n\nAn argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84256.json)","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}