CVE-2009-0388: Tightvnc
High severity, CVSS 10.0. EPSS: 13.3% chance of exploitation in the next 30 days.
Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.
Affected products
Published 2009-02-04. Last modified 2026-06-16.