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

Quick assessment

Affected
UltraVNC Team UltraVNC Launcher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UltraVNC Launcher是UltraVNC公司的一个远程控制软件中的启动器。 UltraVNC Launcher 1.2.4.0版本存在安全漏洞，该漏洞源于中继主机配置字段处理不当，可能导致应用程序崩溃。

CVSS 7.5 · High EPSS 0.55% · P44

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-37133

Vulnerability Information
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Vulnerability Title
UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
UltraVNC Launcher 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UltraVNC Launcher是UltraVNC公司的一个远程控制软件中的启动器。 UltraVNC Launcher 1.2.4.0版本存在安全漏洞，该漏洞源于中继主机配置字段处理不当，可能导致应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
UltraVNC Team UltraVNC Launcher 1.2.4.0 -

II. Public POCs for CVE-2020-37133

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III. Intelligence Information for CVE-2020-37133

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Same Patch Batch · UltraVNC Team · 2026-02-05 · 3 CVEs total

CVE-2020-37134 7.5 HIGH UltraVNC Viewer 1.2.4.0 - 'VNCServer' Denial of Service
CVE-2020-37132 6.2 MEDIUM UltraVNC Launcher 1.2.4.0 - 'Password' Denial of Service

IV. Related Vulnerabilities

Same product: UltraVNC Launcher
Same vendor: UltraVNC Team
Same weakness: CWE-121

V. Comments for CVE-2020-37133

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