High severity7.5NVD Advisory· Published Feb 5, 2026· Updated Apr 15, 2026

CVE-2020-37134

Description

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.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.exploit-db.com/exploits/48291nvd
www.uvnc.comnvd
www.vulncheck.com/advisories/ultravnc-viewer-vncserver-denial-of-servicenvd

News mentions

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