CVE-2025-66600

HIGH
8.8
CVSS Score
Published: February 9, 2026 at 03:24 AM UTC
Updated: June 17, 2026 at 09:57 AM UTC
1 product affected across 1 vendorFAST/TOOLS

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Severity
HIGH8.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

R9.01 ≤ v ≤ R10.04R9.01

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHYokogawaGroup
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-358

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