CVE-2020-37133 MEDIUM

CVE-2020-37133: UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service

Vendor Ultravnc Team
Product UltraVNC Launcher
Weakness CWE-121
Published February 5, 2026
Last update February 5, 2026
View on NVD All CVEs

CVSS base score

6.7/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 5, 2026 CVE published
February 5, 2026 Record updated