CVE-2008-0610: Ultravnc

High severity, CVSS 9.3. EPSS: 38.8% chance of exploitation in the next 30 days.

Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConnection.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using the DSM plugin, allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a modified size value.

Affected products

• Ultravnc Ultravnc: version 1.0.2 only; version 1.0.4 only; version 1.0.4_rc6 only; version 1.0.4_rc7 only; version 1.0.4_rc8 only

Published 2008-02-06. Last modified 2026-06-16.