Back to Database
Status published
Critical
CVE-2021-42785
Buffer Overflow in tvnviewer.exe via Crafted Packet in TightVNC Viewer 2.8.59
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-42785
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Eugene Lim from Government Technology Agency of Singapore
References
Affected Vendor
GlavSoft LLC
View all reports →Affected Software
TightVNC Viewer
Vulnerable Versions:
2.8.59
Timeline
Official Publish:
November 23rd, 2021
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H