CVE-2025-66600 PUBLISHED

Assigner: YokogawaGroup
Reserved: 05.12.2025 Published: 09.02.2026 Updated: 09.02.2026

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

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Yokogawa Electric Corporation
Product	FAST/TOOLS
Versions	Default: unknown affected from R9.01 to R10.04 (incl.)

References

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

Problem Types

CWE-358 CWE