CVE-2025-66606: Yokogawa Fast/tools

Critical severity, CVSS 9.6. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product does not properly encode URLs. An attacker could tamper with web pages or execute malicious scripts. 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.