CVE-2021-42785

Buffer Overflow in tvnviewer.exe via Crafted Packet in TightVNC Viewer 2.8.59

CVE-2021-42785 is fixed in TightVNC on 1 platform by TightVNC 2.8.63.0 (version 2.8.63.0), released August 9, 2021. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
9.8
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0234
83rd percentile

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.

Where it's fixed

ProductFixed inFixReleased
Windows apps
TightVNC 2.8.63.0 TightVNC 2.8.63.0 Aug 9, 2021

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