CVE-2026-103665
Received Received - Intake

Yamaha LAN Monitor Windows DLL Hijacking Vulnerability

Publication date: 2026-10-29

Last updated on: 2026-10-29

Assigner: JPCERT/CC

Description
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.

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Meta Information

Published
2026-10-29
Last Modified
2026-10-29
Generated
2026-10-29
AI Q&A
2026-10-29
EPSS Evaluated
N/A
NVD
CVE-2026-103665
EUVD
EUVD-2026-112752

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Yamaha Corporation Yamaha LAN Monitor for Windows 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-427 The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

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Executive Summary

This vulnerability involves the Yamaha LAN Monitor for Windows installer insecurely loading Dynamic Link Libraries (DLLs). If a malicious DLL is placed in the installation directory, it can be loaded by the installer, allowing arbitrary code execution with administrative privileges.

Detection Guidance

Check installed versions of Yamaha LAN Monitor for Windows. If versions 1.9.3 or earlier are found, the system is potentially vulnerable. Inspect directories where installers are run for unexpected DLL files.

Impact Analysis

An attacker could exploit this to execute arbitrary code on your system with high privileges, potentially installing malware, stealing data, or taking control of your computer. This could happen if you run the installer from an untrusted directory.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations may face legal penalties, reputational damage, and loss of trust if exploited.

Mitigation Strategies

Update Yamaha LAN Monitor for Windows to version 1.10.1 or later. Avoid running installers from untrusted sources. Remove any suspicious DLL files from directories where installers are executed.

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