CVE-2020-37133
UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service
- State
- Published
- Severity
- 6.7 Medium
- Published
- Feb 5, 2026
- Updated
- Feb 5, 2026
- Reserved
- Feb 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.7 Medium | 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 | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
UltraVNC LauncherUltraVNC Team |
|
References
- ExploitDB-48288exploit
- UltraVNC Official Homepageproduct
- VulnCheck Advisory: UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Servicethird-party-advisory
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