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CVE-2021-42785

CRITICAL CVSS: 9.8 Published: 2021-11-23 Modified: 2026-06-17

Description

Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.

Affected Platforms

Tightvnc Tightvnc

Weakness Type

CWE-120, CWE-120

References