{"id":"CVE-2017-12166","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-12166","generatedAt":"2026-10-28T20:57:53.215Z","title":"OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution.","description":"OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution.","published":"2017-10-04T01:29:02.000Z","lastModified":"2026-06-17T01:02:48.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["openvpn/openvpn","debian/debian linux"],"epss":{"score":0.03629,"percentile":0.89478,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (3.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/101153","tags":["Third Party Advisory","VDB Entry","URL Repurposed"],"source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1039470","tags":["Third Party Advisory","VDB Entry","URL Repurposed"],"source":"secalert@redhat.com"},{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2017-12166","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/101153","tags":["Third Party Advisory","VDB Entry","URL Repurposed"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039470","tags":["Third Party Advisory","VDB Entry","URL Repurposed"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2017-12166","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-12166","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}