CVE-2019-25601 MEDIUM

CVE-2019-25601: UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow

Vendor Uvnc
Product UltraVNC Launcher
Weakness CWE-787
Published March 22, 2026
Last update March 23, 2026

CVSS base score

6.9/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

UltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payload of repeated characters through the Properties dialog to trigger a denial of service condition.

Key dates

02Disclosure timeline

March 22, 2026 CVE published
March 23, 2026 Record updated