CVE-2026-3787

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 6.2% of scored records. A rank, not a probability.

NVD base score

6.4 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-08 23:02Z5 MO AGO

Last updated

2026-03-10 20:26Z5 MO AGO

Reserved

2026-03-08

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

High (CVSS 7.3)

CNA CVSS vector

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

Weaknesses

• CWE-426Untrusted Search PathBase
• CWE-427Uncontrolled Search Path ElementBase

Data version

5.2

Document digest

94f972c9364801ad6d743a21a4ba9ebc55486d963d0687444ac7a5fc0dd0fc1c

• vuldb.comVDB-349754 | UltraVNC Windows Service cryptbase.dll uncontrolled search pathhttps://vuldb.com/?id.349754vdb-entry
• vuldb.comVDB-349754 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/?ctiid.349754signaturepermissions-required
• vuldb.comSubmit #767257 | UltraVNC 1.6.4.0 Uncontrolled Search Pathhttps://vuldb.com/?submit.767257third-party-advisory
• drive.google.comhttps://drive.google.com/file/d/14ixv_1i4D2VrZWyl4RKsvFcN1AMF_qNx/viewrelated