Riskcovery

CVE-2026-79680

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

State
Published
Severity
4.5 Medium
Published
Sep 24, 2026
Updated
Sep 24, 2026
Reserved
Aug 25, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.04.5 MediumCVSS: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:LQt

Weaknesses

  • CWE-288 Authentication Bypass Using an Alternate Path or Channel

Affected Products

ProductVersions
qtqt
  • 6.4.0 to before 6.8.9Affected
  • 6.9.0 to before 6.11.3Affected

References

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