CVE-2023-27830

TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.

CVSS v3.1 NVD

9.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS

1.08% chance of exploitation in the next 30 days, 65th percentile

Published

2023-04-12

Updated

2025-02-08

Proof-of-concept exploits (1)

• https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-816520…

Security advisories

• https://www.tightvnc.com/news.php
• https://www.tightvnc.com/whatsnew.php

References

• CVE Record
• NVD entry