CVE-2025-66597
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Weak Cryptography in Yokogawa FAST/TOOLS Enables Data Decryption

Publication date: 2026-02-09

Last updated on: 2026-03-06

Assigner: YokogawaGroup

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

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Meta Information

Published
2026-02-09
Last Modified
2026-03-06
Generated
2026-07-06
AI Q&A
2026-02-09
EPSS Evaluated
2026-07-05
NVD
CVE-2025-66597
EUVD
EUVD-2025-207176

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
yokogawa fast/tools From r9.01 (inc) to r10.04 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-327 The product uses a broken or risky cryptographic algorithm or protocol.

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Executive Summary

This vulnerability exists in FAST/TOOLS by Yokogawa Electric Corporation, which supports weak cryptographic algorithms. Because of these weak algorithms, an attacker could potentially decrypt communications between clients and the web server.

Impact Analysis

The impact of this vulnerability is that an attacker could intercept and decrypt sensitive communications with the web server. This could lead to unauthorized access to confidential information or manipulation of data transmitted between users and the server.

Compliance Impact

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