CVE-2019-25601: Uvnc Ultravnc Launcher

Medium severity, CVSS 6.2. EPSS: 0.3% chance of exploitation in the next 30 days.

UltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payload of repeated characters through the Properties dialog to trigger a denial of service condition.

Affected products

• Uvnc Ultravnc Launcher: version 1.2.2.4 only

Published 2026-03-22. Last modified 2026-06-17.