PT-2026-26989 · Uvnc · Ultravnc Launcher

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

Positive Technologies (AI Summary)

CVSS v3.1

6.2

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions UltraVNC Launcher version 1.2.2.4

Description A buffer overflow occurs in the 'Path vncviewer.exe' property field. Local attackers can cause the application to crash by providing an excessively long string, such as a 300-byte payload of repeated characters through the Properties dialog, resulting in a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

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 · Note
• https://vulncheck.com/advisories/ultravnc-launcher-denial-of-service-buffer-overflow · Note
• https://uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html · Note