Home/CVE/A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. The web server accepts access
CVE

CVE-2025-66602

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. The web server accepts access

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.

CRITICAL · CVSS 9.8 EPSS 0.00065
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-291Reliance on IP Address for Authentication
▤

Affected Products & Versions

1
yokogawa fast\/tools>= r9.01 and <= r10.04
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · 7168b535-132a-4efe-a076-338f829b2eb9
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Feb 2026 · 04:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-041-01
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdfVendor Advisory
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