CVE-2025-66598: Yokogawa Fast/tools

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports old SSL/TLS versions, 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

Affected products

• Yokogawa Fast/tools: from r9.01, up to and including r10.04

Published 2026-02-09. Last modified 2026-06-17.