CVE-2019-25601

MEDIUM 6.2

UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow

CVSS Score

6.2

EPSS Score

0.0%

EPSS Percentile

2th

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.

CWE	CWE-787
Vendor	uvnc
Product	ultravnc launcher
Published	Mar 22, 2026
Last Updated	Mar 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Uvnc / UltraVNC Launcher

1.2.2.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/46703 uvnc.com: https://www.uvnc.com/ uvnc.com: https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html vulncheck.com: https://www.vulncheck.com/advisories/ultravnc-launcher-denial-of-service-buffer-overflow

Credits

Victor Mondragón