CVE-2019-8264: Uvnc Ultravnc

Critical severity, CVSS 9.8. EPSS: 3.1% chance of exploitation in the next 30 days.

UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside Ultra2 decoder, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204.

Affected products

• Uvnc Ultravnc: before 1.2.2.3 (fixed in 1.2.2.3)

Published 2019-03-08. Last modified 2026-06-17.