CVE-2025-66597 - Vulnerability Details - OpenCVE

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports weak cryptographic algorithms, potentially allowing an attacker to decrypt communications with the web server. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Yokogawa	Fast/tools

No data.

No data.

References

Link	Providers
https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf

History

Mon, 09 Feb 2026 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 09 Feb 2026 11:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Yokogawa Yokogawa fast/tools
Vendors & Products		Yokogawa Yokogawa fast/tools

Mon, 09 Feb 2026 04:30:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports weak cryptographic algorithms, potentially allowing an attacker to decrypt communications with the web server. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04
Weaknesses		CWE-327
References		https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
Metrics		cvssV4_0 `{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: YokogawaGroup

Published: 2026-02-09T03:31:24.991Z

Updated: 2026-02-09T19:05:50.700Z

Reserved: 2025-12-05T05:04:18.582Z

Link: CVE-2025-66597

Vulnrichment

Updated: 2026-02-09T19:04:08.041Z

NVD

Status : Awaiting Analysis

Published: 2026-02-09T05:16:24.070

Modified: 2026-02-09T16:08:35.290

Link: CVE-2025-66597

Redhat

No data.

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