CVE-2019-25601

UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow

Published Mar 22, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Uvnc ultravnc
CPEs cpe:2.3:a:uvnc:ultravnc:1.2.2.4:*:*:*:*:*:*:*
Vendors & Products Uvnc ultravnc
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Uvnc
Uvnc ultravnc Launcher
Vendors & Products Uvnc
Uvnc ultravnc Launcher
Type Values Removed Values Added
Description 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.
Title UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.9, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 9:44 PM
Reserved
Mar 22, 2026, 12:59 PM
Status
Deferred
Published
Mar 22, 2026, 2:16 PM
Modified
Jun 17, 2026, 2:32 AM