CVE-2026-3787

UltraVNC Windows Service cryptbase.dll uncontrolled search path

CVSS 7.3 HIGHEPSS 0.2%CWE-426 CWE-427

Vexday Risk Score

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 7.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

08 mar 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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.

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Produtos afetados

n/a · UltraVNC

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Referências

https://drive.google.com/file/d/14ixv_1i4D2VrZWyl4RKsvFcN1AMF_qNx/view https://vuldb.com/?ctiid.349754 https://vuldb.com/?id.349754 https://vuldb.com/?submit.767257