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NVD Vulnerability Details :
CVE-2020-37133
Analyzed
More InfoOfficial Page
Source-disclosure@vulncheck.com
View Known Exploited Vulnerability (KEV) details
Published At-05 Feb, 2026 | 17:16
Updated At-09 Feb, 2026 | 22:09

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.7MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 4.0
Base score: 6.7
Base severity: MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches
uvnc
uvnc
>>ultravnc>>Versions up to 1.2.4.0(inclusive)
cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-121Primarydisclosure@vulncheck.com
CWE-787Primarynvd@nist.gov
CWE ID: CWE-121
Type: Primary
Source: disclosure@vulncheck.com
CWE ID: CWE-787
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://www.exploit-db.com/exploits/48288disclosure@vulncheck.com
Exploit
Third Party Advisory
VDB Entry
https://www.uvnc.com/disclosure@vulncheck.com
Product
https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-servicedisclosure@vulncheck.com
Third Party Advisory
Hyperlink: https://www.exploit-db.com/exploits/48288
Source: disclosure@vulncheck.com
Resource:
Exploit
Third Party Advisory
VDB Entry
Hyperlink: https://www.uvnc.com/
Source: disclosure@vulncheck.com
Resource:
Product
Hyperlink: https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory
Change History
0Changes found
Details not found