Trending
CVE-2026-3787

CVE detail

CVE-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 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 6.4 · MediumBuzz score 22.6

Buzz score

Why this CVE is surfacing

Buzz score total 22.6

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 16.1 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

16.1

4 evidence mentions in the snapshot

Diversity score

6.5

2 sources across 1 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

4 source links · newest first

https://vuldb.com/?submit.767257vuldb.com
No excerpt available.
Exploitvuldb.comMar 8, 2026, 11:15 PM
https://vuldb.com/?id.349754vuldb.com
No excerpt available.
Exploitvuldb.comMar 8, 2026, 11:15 PM
https://vuldb.com/?ctiid.349754vuldb.com
No excerpt available.
Exploitvuldb.comMar 8, 2026, 11:15 PM
https://drive.google.com/file/d/14ixv_1i4D2VrZWyl4RKsvFcN1AMF_qNx/viewdrive.google.com
No excerpt available.
Exploitdrive.google.comMar 8, 2026, 11:15 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

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4 mentions
CVE-2025-5180
A vulnerability, which was classified as critical, has been found in Wondershare Filmora 14.5.16. Affected by this issue is some unknown functionality in the library CRYPTBASE.dll…
CVSS 7.3 · High
CVE-2025-4525
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CVSS 7.3 · High
CVE-2024-27303
electron-builder is a solution to package and build a ready for distribution Electron, Proton Native app for macOS, Windows and Linux. A vulnerability that only affects eletron-bu…
CVSS 7.3 · High
CVE-2017-20123
A vulnerability was found in Viscosity 1.6.7. It has been classified as critical. This affects an unknown part of the component DLL Handler. The manipulation leads to untrusted se…
CVSS 8.8 · High
CVE-2019-20358
Trend Micro Anti-Threat Toolkit (ATTK) versions 1.62.0.1218 and below have a vulnerability that may allow an attacker to place malicious files in the same directory, potentially l…
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1 mention

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-3787.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:microsoft:windowsSearch this product on Shodan
cpe:2.3:a:uvnc:ultravncSearch this product on Shodan

Exact CVE query

Eligible paid Shodan plan required

Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2026-3787Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Analyzed

Published

Mar 8, 2026

Modified

Jun 17, 2026

Official record

Authoritative NVD record

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

CWE IDs

Vendor classifications

How this vector reads

CVSS 4.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): High. Successful exploitation depends on conditions outside the attacker's control.
Attack Requirements (AT): None. No prerequisite deployment or execution condition is required.
Privileges Required (PR): Low. The attacker needs basic user-level privileges.
User Interaction (UI): None. Exploitation does not require a targeted user to act.
Vulnerable System Confidentiality (VC): High. There is a total or serious impact to this security property.
Vulnerable System Integrity (VI): High. There is a total or serious impact to this security property.
Vulnerable System Availability (VA): High. There is a total or serious impact to this security property.
Subsequent System Confidentiality (SC): None. There is no direct impact to this security property.
Subsequent System Integrity (SI): None. There is no direct impact to this security property.
Subsequent System Availability (SA): None. There is no direct impact to this security property.

Optional CVSS v4 metrics remain in the raw vector; only base metrics are expanded here.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses