{"schemaVersion":3,"id":"CVE-2026-84790","aliases":["UBUNTU-CVE-2026-84790","DEBIAN-CVE-2026-84790"],"status":"published","duplicateOf":null,"title":null,"description":"OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field","dates":{"published":"2026-10-13T21:39:05.221Z","modified":"2026-10-18T13:54:09.591Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.6,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Debian","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true}]},"epss":{"probability":0.00217,"percentile":0.11474,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00217,"percentile":0.11474}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00217,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00217,"percentile":0.11474}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-158","name":"Improper Neutralization of Null Byte or NUL Character","description":"The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component.","type":"weakness","status":"Incomplete","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/158.html"},{"id":"CWE-290","name":"Authentication Bypass by Spoofing","description":"This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/290.html"}],"affected":[{"vendor":"debian","product":"openvpn","name":"openvpn","label":"openvpn","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/openvpn","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 2.7.8-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 2.7.8-1","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null},{"vendor":"ubuntu","product":"openvpn","name":"openvpn","label":"openvpn","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openvpn","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null},{"vendor":"openvpn","product":"openvpn","name":"OpenVPN","label":"openvpn","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.7_alpha1, ≤ 2.7.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.7_alpha1, ≤ 2.7.7","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":"/vendor/openvpn/openvpn"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/CVE-2026-84790","label":"ubuntu.com/security/CVE-2026-84790","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84790","label":"www.cve.org/CVERecord?id=CVE-2026-84790","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-84790","label":"security-tracker.debian.org/tracker/CVE-2026-84790","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-84790","label":"community.openvpn.net/Security%20Announcements/CVE-2026-84790","hostname":"community.openvpn.net","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T21:39:05.221Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-18T13:54:09.591Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T05:26:48.617Z","stale":false,"partial":false}}