{"id":"CVE-2026-81738","title":"OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries","summary":"OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L","cwe":["CWE-121","CWE-193","CWE-787"],"vendor":"OpenVPN","product":"OpenVPN","affected":["OpenVPN >= 2.5.0 <= 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-2026-81738","references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-81738","label":"security@openvpn.net"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81738.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81738"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81738"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81738"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00331,"epssPercentile":0.23469,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T14:54:55.935316Z"},"cvssSource":"cna","ingestedAt":"2026-09-08T15:33:26.975Z","scores":{"cna":2.3,"vendor":4.2},"slug":"CVE-2026-81738","body":"## Overview\n\nOpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries\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 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81738.json)","depth":"sunlit","depthScore":13,"depthScoreParts":{"impact":12.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}