A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation.

published 2026-02-09 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-207170

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits: 0; none known

The web server accepts the OPTIONS method. An attacker could potentially use this information to carry out other attacks.

The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-041-01 updated 2026-02-10 cvss 3.1

Yokogawa FAST/TOOLS

Yokogawa FAST/TOOLS >=R9.01, <=R10.04
affected: mitigation “Yokogawa recommends users update to revision R10.04 and apply patch software (CS_e12787). After the patch is applied, users should apply R10.04 SP3.” contact.yokogawa.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 8 mo ago (2026-02-09)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Yokogawa Electric Corporation FAST/TOOLS

Classification

Weakness

CWE-358 Improperly Implemented Security Check for Standard

References

web-material3.yokogawa.com /1/39206/files/YSAR-26-0001-E.pdf
vendor-advisory

Sources

CVE List CVE-2025-66603
NVD CVE-2025-66603

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Summary