CVE-2022-25226
ThinVNC version 1.0b1 allows an unauthenticated user to bypass the authentication process via 'http://thin-vnc:8080/cmd?cmd=connect' by obtaining a valid...
- Published
- Apr 18, 2022
- Updated
- Aug 3, 2024
- Assigning CNA
- Fluid Attacks
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 95.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
ThinVNC version 1.0b1 allows an unauthenticated user to bypass the authentication process via 'http://thin-vnc:8080/cmd?cmd=connect' by obtaining a valid SID without any kind of authentication. It is possible to achieve code execution on the server by sending keyboard or mouse events to the server.
Sources
1- CVE-2022-25226Exploit
Python exploit script for ThinVNC 1.0b1 authentication bypass (CVE-2022-25226) that chains unauthenticated /cmd endpoint access with AMSI bypass and clipboard injection to deliver a reverse shell.
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