CVE-2025-66600
High
Description
A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product lacks HSTS (HTTP Strict Transport Security) configuration. When an attacker performs a Man in the middle (MITM) attack, communications with the web server could be sniffed. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04
SeverityHigh
CVSS8.8
Exploit probability—
ProductFAST/TOOLS
PublishedFeb 9, 2026
First seenFeb 9, 2026
Weakness typeCWE-358CWE-358
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Yokogawa Electric Corporation FAST/TOOLS | R9.01 ≤ v ≤ R10.04 | — |
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