PT-2026-26989 · Uvnc · Ultravnc Launcher

Victor Mondragón · Published 2026-03-22 · Updated 2026-03-22 · CVE-2019-25601

Mitre

CVSS v3.1

6.2

Medium

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2019-25601

Affected Products

Ultravnc Launcher

References · 5

• 🔥 https://exploit-db.com/exploits/46703 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-25601 · Security Note
• https://uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html · Note
• https://vulncheck.com/advisories/ultravnc-launcher-denial-of-service-buffer-overflow · Note
• https://uvnc.com · Note