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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Thu, 24 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module
First Time appeared Qt
Qt qt
Weaknesses CWE-288
CPEs cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
References
Metrics cvssV4_0

{'score': 4.5, '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/V:D/RE:L'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-09-24T12:18:38.627Z

Reserved: 2026-08-25T11:34:53.548Z

Link: CVE-2026-79680

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-24T11:16:47.117

Modified: 2026-09-24T11:16:47.117

Link: CVE-2026-79680

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-24T12:30:18Z

Weaknesses