CVE-2025-66602 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.

The web server accepts access by IP address. When a worm that randomly searches for IP addresses intrudes into the network, it could potentially be attacked by the worm.

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:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	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-291 CWE