---
id: CVE-2026-103665
title: >-
  The installer for Yamaha LAN Monitor for Windows provided by Yamaha
  Corporation may insecurely load Dynamic Link Libraries (DLLs)
summary: >-
  The installer for Yamaha LAN Monitor for Windows provided by Yamaha
  Corporation may insecurely load Dynamic Link Libraries (DLLs). When the
  installer is launched in a directory containing a specially crafted DLL file,
  the malicious DLL m…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-427
vendor: Yamaha Corporation
product: Yamaha LAN Monitor for Windows
affected:
  - yamaha_lan_monitor_for_windows <= Ver.1.9.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-29T14:10:35.298179Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T14:10:50.402Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103665'
references:
  - url: 'https://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVN23695234.html'
  - url: 'https://jvn.jp/en/jp/JVN23695234/'
tags:
  - cve.org
epss: 0.00194
epssPercentile: 0.09096
ingestedAt: '2026-11-01T20:00:16.933Z'
---

## Overview

The installer for Yamaha LAN Monitor for Windows provided by Yamaha Corporation may insecurely load Dynamic Link Libraries (DLLs). When the installer is launched in a directory containing a specially crafted DLL file, the malicious DLL may be loaded, resulting in arbitrary code execution with administrative privileges.

## Affected

- `yamaha_lan_monitor_for_windows <= Ver.1.9.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.