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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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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Tightvnc/Tightvncllm-fuzzy2 versions
    (expand)+ 1 more
    • (no CPE)
    • cpe:2.3:a:tightvnc:tightvnc:*:*:*:*:*:*:*:*range: <=2.8.59
  • GlavSoft LLC/TightVNC Viewerv5
    Range: 2.8.59

Patches

Vulnerability mechanics

References

1

News mentions

0

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