A weakness has been identified in UltraVNC 1.6.4.0 on Windows.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Mar 8, 2026 · NIST NVD

   Detected

   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

2. Jun 17, 2026 · NIST NVD

   Updated

   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

Affected

• cpe uvnc/ultravnc1.6.4.0

Sources

• CVE.orgVulnerability recordCVE-2026-3787

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-3787

  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 neede

  nvd.nist.gov

References

• Permissions Required · drive.google.com
• Permissions Required · vuldb.com
• Third Party Advisory · vuldb.com
• Third Party Advisory · vuldb.com