CVE-2019-25601CWE-787

UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow

Medium · published March 22, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
17.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00268 · 17.9th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-03-22T13:38Z
EPSS history
Timeline
  • 22 MAR 13:38Z
    UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow
    cvelistv5