CVE-2016-9941: Libvncserver Project Libvncserver

Critical severity, CVSS 9.8. EPSS: 3.7% chance of exploitation in the next 30 days.

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area.

Affected products

• Libvncserver Project Libvncserver: up to and including 0.9.10

Published 2016-12-31. Last modified 2026-06-17.