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Vulnerability DatabaseCVE-2026-3787

CVE-2026-3787: 
UltraVNC vulnerability analysis and mitigation

A weakness has been identified in UltraVNC 1.6.4.0 on Windows. This affects an unknown function in the library cryptbase.dll of the component Windows Service. This manipulation causes uncontrolled search path. The attack requires local access. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Source: NVD

Related UltraVNC vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2009-0388HIGH10
  • TightVNCTightVNC
  • cpe:2.3:a:tightvnc:tightvnc
NoYesFeb 04, 2009
CVE-2008-5001HIGH9.3
  • UltraVNCUltraVNC
  • cpe:2.3:a:ultravnc:ultravnc
NoYesNov 10, 2008
CVE-2026-4962HIGH7.3
  • UltraVNCUltraVNC
  • cpe:2.3:a:ultravnc:ultravnc
NoNoMar 27, 2026
CVE-2026-3787HIGH7.3
  • UltraVNCUltraVNC
  • cpe:2.3:a:ultravnc:ultravnc
NoNoMar 08, 2026
CVE-2010-5248MEDIUM6.9
  • UltraVNCUltraVNC
  • cpe:2.3:a:ultravnc:ultravnc
NoYesSep 07, 2012

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