VulnerabilityAwaiting Analysis

CVE-2026-79680

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

MEDIUM 4.5EPSS 0.34%

Does this matter?

Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 4.5 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.34% probability · 28th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-288
Source: a59d8014-47c4-4630-ab43-e1b13cbe58e3

EPSS trend

EPSS moved from 0.3% on 25 September 2026 to 0.3% on 26 October 2026.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.