Critical severity9.8NVD Advisory· Published Nov 23, 2021· Updated Jun 17, 2026
CVE-2021-42785
CVE-2021-42785
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.
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Affected products
2- GlavSoft LLC/TightVNC Viewerv5Range: 2.8.59
Patches
Vulnerability mechanics
References
1- www.tightvnc.com/whatsnew.phpnvdRelease NotesVendor Advisory
News mentions
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