Unrated severityNVD Advisory· Published Feb 5, 2026· Updated Feb 5, 2026
UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service
CVE-2020-37133
Description
UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.
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Affected products
2- UltraVNC Team/UltraVNC Launcherv5Range: 1.2.4.0
Patches
Vulnerability mechanics
References
3- www.exploit-db.com/exploits/48288mitreexploit
- www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-servicemitrethird-party-advisory
- www.uvnc.commitreproduct
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