{"id":"CVE-2026-79680","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-79680","generatedAt":"2026-10-27T23:57:03.613Z","title":"Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module.","description":"Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module. An attacker using a specially modified VNC client that violates the RFB protocol can bypass Qt VNC Server's password authentication and gain unauthorized remote access to the shared application, compromising the confidentiality and integrity of the session.","published":"2026-09-24T11:16:47.000Z","lastModified":"2026-09-24T21:08:23.000Z","status":"Awaiting Analysis","sourceIdentifier":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","cvss":{"version":"4.0","score":4.5,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-288"],"affected":[],"epss":{"score":0.00342,"percentile":0.2754,"date":"2026-10-26","history":[{"date":"2026-09-25","score":0.00342,"percentile":0.25068}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-24T11:16:47.000Z","detail":{"score":"4.5","severity":"MEDIUM","publishedAt":"2026-09-24T11:16:47.117Z"},"summary":"New CVE, medium severity (CVSS 4.5)."}],"references":[{"url":"https://codereview.qt-project.org/c/qt/tqtc-qtvncserver/+/759160","source":"a59d8014-47c4-4630-ab43-e1b13cbe58e3"},{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-79680:","source":"a59d8014-47c4-4630-ab43-e1b13cbe58e3"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-79680","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."}