CVE-2025-66606

criticalpriority · track · 38EPSS 0.003 · 17 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 9.6 · critical

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-26

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product does not properly encode URLs. An attacker could tamper with web pages or execute malicious scripts. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationFAST/TOOLScisa_csaf_ot
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.

cvss

Technical severity, 0–10. One row per scoring source.

9.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–critical · 0.5–9.6

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 6

v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:Nsecondary · CISA US

v3.13.4lowAV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v4.02.1lowCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:Nsecondary · ENISA EU

v4.02.1lowCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/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:Xsecondary

v4.00.5lowCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-86USCWE-86USCWE-86US

affected products (5)

Products and version ranges known to be affected.

Yokogawa FAST/TOOLS: >=R9.01|<=R10.04all versionscisa_csaf_otUS
Yokogawa FAST/TOOLSR9.01| → R10.04cisa_csaf_otUS
Yokogawa Electric Corporation FAST/TOOLS≤ R9.01 ≤R10.04enisa_euvdEU
Yokogawa Electric Corporation FAST/TOOLSR9.01 → R10.04fstec_bduRU
yokogawa fast/toolsr9.01 → r10.04nvdUScpe:2.3:a:yokogawa:fast\/tools:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-26-041-01Yokogawa FAST/TOOLS2026-02-10icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to redirected users to malicious sites, decrypt communications, perform a man-in-the-middle (MITM) attack, execute malicious scripts, steal files, and perform other various attacks.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2026-02-09modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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