CVE-2020-37133

MEDIUM EPSS 38.1%
Published Feb 5, 20264mo ago · Modified Jun 17, 20261w ago
6.7 CVSS 4.0
Medium
Find Similar
Published Feb 5, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.7
Exploitability
—
Impact
—
Vector string
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
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
38.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-121
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 1

VendorProductVersionRange
uvncultravnc* ≤1.2.4.0

References 3

  • exploit-db.com https://www.exploit-db.com/exploits/48288
    ExploitThird Party AdvisoryVDB Entry
  • uvnc.com https://www.uvnc.com/
    Product
  • vulncheck.com https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.