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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.

PUBLISHED Reserved 2026-02-03 | Published 2026-02-05 | Updated 2026-02-05 | Assigner VulnCheck




MEDIUM: 6.7CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem types

Stack-based Buffer Overflow

Product status

1.2.4.0
affected

Credits

chuyreds finder

References

www.exploit-db.com/exploits/48290 (ExploitDB-48290) exploit

www.uvnc.com/ (UltraVNC Official Homepage) product

www.vulncheck.com/...vnc-launcher-password-denial-of-service (VulnCheck Advisory: UltraVNC Launcher 1.2.4.0 - 'Password' Denial of Service) third-party-advisory

cve.org (CVE-2020-37132)

nvd.nist.gov (CVE-2020-37132)

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