CVE-2020-37134
High · 7.5CVSS
7.5
EPSS
0.4%
Published
Feb 5, 2026
CISA due date
—
The record
UltraVNC Viewer 1.2.4.0 contains a denial of service vulnerability that allows attackers to crash the application by manipulating VNC Server input. Attackers can generate a malformed 256-byte payload and paste it into the VNC Server connection dialog to trigger an application crash.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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