{"id":"CVE-2020-15078","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-15078","generatedAt":"2026-10-27T23:29:43.352Z","title":"OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.","description":"OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.","published":"2021-04-26T14:15:09.000Z","lastModified":"2026-06-17T02:56:01.000Z","status":"Modified","sourceIdentifier":"security@openvpn.net","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-305","CWE-306"],"affected":["openvpn/openvpn","fedoraproject/fedora","canonical/ubuntu linux","debian/debian linux"],"epss":{"score":0.04908,"percentile":0.92046,"date":"2026-10-26","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 (4.91%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2020-15078","tags":["Patch","Vendor Advisory"],"source":"security@openvpn.net"},{"url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","tags":["Broken Link"],"source":"security@openvpn.net"},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"security@openvpn.net"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/","source":"security@openvpn.net"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/","source":"security@openvpn.net"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/","source":"security@openvpn.net"},{"url":"https://security.gentoo.org/glsa/202105-25","tags":["Third Party Advisory"],"source":"security@openvpn.net"},{"url":"https://usn.ubuntu.com/usn/usn-4933-1","tags":["Third Party Advisory"],"source":"security@openvpn.net"},{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2020-15078","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","tags":["Broken Link"],"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"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJUXEYHUPREEBPX23VPEKMFXUPVO3PMU/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JGEGLC4YGBDN5CGHTNWN2GH6DJJA36T2/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PLDB3OBQ3AODYYRN7NRCABV6I4AUFAT6/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202105-25","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/usn/usn-4933-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-15078","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."}