Vulnerability in FAST/TOOLS by Yokogawa Electric Corporation
CVE-2025-66603

2.1LOW

Key Information:

Vendor: Yokogawa Electric Corporation
Status: Fast/tools
Vendor: CVE Published:; 9 February 2026

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What is CVE-2025-66603?

A vulnerability has been detected in FAST/TOOLS, a product of Yokogawa Electric Corporation. This issue arises from the web server's acceptance of the OPTIONS method, which could be exploited by attackers to gather information that aids in the execution of further attacks. The affected versions include FAST/TOOLS R9.01 to R10.04, including various packages such as RVSVRN, UNSVRN, HMIWEB, FTEES, and HMIMOB. It’s essential for users to review their system configurations to mitigate potential risks.

Affected Version(s)

FAST/TOOLS R9.01

References

https://web-material3.yokogawa.com/1/39206/files/YSAR-26-...

CVSS V4

Score:

2.1

Severity:

LOW

Confidentiality:

Low

Integrity:

None

Availability:

None

Attack Vector:

Network

Attack Complexity:

High

Attack Required:

None

Privileges Required:

Undefined

User Interaction:

Unknown

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Timeline

Vulnerability published
Feb 9, 2026
Vulnerability Reserved
Dec 5, 2025

CVE-2025-66603 Data

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