CVE-2026-79680
4.5
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| qt | qt | 6.4.0 < 6.8.9 | affected |
| qt | qt | 6.9.0 < 6.11.3 | affected |
Weaknesses
- CWE-288: CWE-288 Authentication Bypass Using an Alternate Path or Channel
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-79680:
- https://codereview.qt-project.org/c/qt/tqtc-qtvncserver/+/759160
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