Medium severityNVD Advisory· Published Sep 24, 2026· Updated Sep 24, 2026

CVE-2026-79680

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.

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Affected products

Qt/Qt VNC Serverllm-create

Patches

Vulnerability mechanics

References

codereview.qt-project.org/c/qt/tqtc-qtvncserver/+/759160nvd
wiki.qt.io/List_of_known_vulnerabilities_in_Qt_productsnvd

News mentions

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