CVE-2026-97860
Received Received - Intake

Yamaha YMS-VPN8 Windows Service Unquoted Path Privilege Escalation

Publication date: 2026-10-29

Last updated on: 2026-10-29

Assigner: JPCERT/CC

Description
YMS-VPN8 and YMS-VPN8-CP provided by Yamaha Corporation register Windows services with unquoted file paths. A user who has write permissions on the system drive may be able to execute arbitrary code with SYSTEM privileges.

CVSS Scores

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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-2026-97860
EUVD
EUVD-2026-112751

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
Yamaha Corporation YMS-VPN8 0
Yamaha Corporation YMS-VPN8-CP 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-428 The product uses a search path that contains an unquoted element, in which the element contains whitespace or other separators. This can cause the product to access resources in a parent path.

Attack-Flow Graph

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Executive Summary

YMS-VPN8 and YMS-VPN8-CP by Yamaha Corporation register Windows services with unquoted file paths. This allows a user with write permissions on the system drive to execute arbitrary code with SYSTEM privileges.

Detection Guidance

Check for Yamaha YMS-VPN8 or YMS-VPN8-CP services with unquoted file paths using Windows commands: 'sc query' to list services, then inspect each service's 'ImagePath' for unquoted paths. Look for services where the path contains spaces without quotes.

Impact Analysis

An attacker with local access could exploit this to gain full control over the affected system, install malware, or steal sensitive data. The high CVSS score indicates significant risk.

Compliance Impact

This vulnerability could lead to unauthorized system access, potentially violating data protection requirements under GDPR or HIPAA due to unauthorized data exposure or modification.

Mitigation Strategies

Update to the latest versions (YMS-VPN8 Ver.1.07.00 or YMS-VPN8-CP Ver.1.07.00). As a temporary workaround, restrict write permissions on the system drive, avoid sharing the PC, prevent untrusted logins, and limit administrative privileges.

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