Public mode

No access to your tenant or devices. Every item links to its source. What this means

Sources need attention Customize Public modeDiscuss ChangeIntel on Discord

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

CVSS 4.0 4.5 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-79680

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-79680

Published

qt

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "qt",
                    "product": "qt",
                    "modules": [
                        "qtvncserver"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "6.4.0",
                            "lessThan": "6.8.9",
                            "versionType": "python"
                        },
                        {
                            "status": "affected",
                            "version": "6.9.0",
                            "lessThan": "6.11.3",
                            "versionType": "python"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 12 Nov 14:22 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current