Vulnerability · Published Feb 5, 2026 · Assigned by VulnCheck
CVE-2020-37132UltraVNC Launcher 1.2.4.0 - 'Password' Denial of Service
Medium 6.2
In plain English
A medium-severity stack buffer overflow in UltraVNC Launcher from UltraVNC Team. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.3%top 83.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in its password configuration properties that allows local attackers to crash the application. Attackers can paste an overly long 300-character string into the password field to trigger an application crash and prevent normal launcher functionality.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| UltraVNC Team | UltraVNC Launcher | 1.2.4.0 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- ExploitDB-48290 exploit
- UltraVNC Official Homepage product
- VulnCheck Advisory: UltraVNC Launcher 1.2.4.0 - 'Password' Denial of Service third-party-advisory