4.5

CVE-2026-79680

Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerqt
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Produkt qt
Default Statusunaffected
Version 6.4.0
Version < 6.8.9
Status affected
Version 6.9.0
Version < 6.11.3
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.34% 0.251
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
a59d8014-47c4-4630-ab43-e1b13cbe58e3 4.5 0 0
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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:D/RE:L/U:X
CWE-288 Authentication Bypass Using an Alternate Path or Channel

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-79680:
https://codereview.qt-project.org/c/qt/tqtc-qtvncserver/+/759160