CVE-2020-37133

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.exploit-db.com/exploits/48288	Exploit Third Party Advisory VDB Entry
https://www.uvnc.com/	Product
https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*

History

09 Feb 2026, 22:09

Type	Values Removed	Values Added
References	~~() https://www.exploit-db.com/exploits/48288 -~~	() https://www.exploit-db.com/exploits/48288 - Exploit, Third Party Advisory, VDB Entry
References	~~() https://www.uvnc.com/ -~~	() https://www.uvnc.com/ - Product
References	~~() https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service -~~	() https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service - Third Party Advisory
CWE		CWE-787
First Time		Uvnc ultravnc Uvnc
CPE		cpe:2.3:a:uvnc:ultravnc::::::::

05 Feb 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-05 17:16

Updated : 2026-02-09 22:09

NVD link : CVE-2020-37133

Mitre link : CVE-2020-37133

CVE.ORG link : CVE-2020-37133

JSON object : View

Products Affected

uvnc

ultravnc

CWE

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

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