TI-2026-82369 Aliases CVE-2026-103665 GHSA-wx4r-57mg-fmh2

Insecure DLL loading in Yamaha LAN Monitor installer for Windows

LOW 38CWE-427Published 2026-10-29 · Updated 2026-10-29

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-427.

Summary

Yamaha LAN Monitor for Windows from 0 through Ver.1.9.3 has an installer that may load Dynamic Link Libraries (DLLs) from an insecure search path (CWE-427). When the installer is launched in a directory containing a specially crafted DLL file, the malicious DLL is loaded and runs arbitrary code with administrative privileges. A local attacker who can place such a file in a directory where a user launches the installer can gain administrative control of the system.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00194 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Yamaha Corporation	Yamaha LAN Monitor for Windows	up to Ver.1.9.3	—	No fix listed	CNA

Yamaha LAN Monitor for Windows VendorYamaha Corporation Affected up to Ver.1.9.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Yamaha LAN Monitor for Windows.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-29 Threatist record created from CVE-2026-103665
2026-10-29 Alias added: GHSA-wx4r-57mg-fmh2
2026-10-29 CISA SSVC decision points changed
2026-10-29 Priority changed: MEDIUM → LOW

References

Other 2

TI-2005-00319 Multiple TCP implementations with Protection Against Wrapped Sequence Numbers (PAWS) with… CVSS 2.0MEDIUM 5.0
TI-2026-82367 OS command injection in Yamaha NWR100 wireless LAN router CVSS 4.0CRITICAL 9.3
TI-2008-02085 Unspecified vulnerability in Yamaha routers allows remote attackers to cause a denial of… CVSS 3.1HIGH 7.5
TI-2026-82368 Unquoted service paths in Yamaha YMS-VPN8 and YMS-VPN8-CP CVSS 4.0HIGH 8.4
TI-2011-01163 Yamaha RTX, RT, SRT, RTV, RTW, and RTA series routers with firmware 6.x through 10.x, and… CVSS 2.0HIGH 7.8
TI-2026-53262 Hard-coded credentials in Yamaha Corporation VOCALOID6 CVSS 4.0MEDIUM 6.9

See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences