CVE-2019-8261: Uvnc Ultravnc

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.

Affected products

• Uvnc Ultravnc: before 1.2.2.3 (fixed in 1.2.2.3)

Published 2019-03-05. Last modified 2026-06-17.