CVE-2026-11833

highpriority · track · 0OT risk · elevatedEPSS 0.003 · 19 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (19th) EPSS

CVSS 7.5 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cisa_csaf_ot

EPSS · scored 2026-10-27

Overview: A vulnerability has been found in FAST/TOOLS and CI Server. The web server may return a response containing the CI Server setting information. This information could be exploited by an attacker for other attacks. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04 CI Server (All packages) R1.01 to R1.04

remediations

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

A vendor fix is available.

FixedFAST/TOOLScisa_csaf_ot
Yokogawa recommends users update FAST/TOOLS up to R10.04 and apply patch software (R10.04 SP4).
MitigationCollaborative Information Server (CI Server)cisa_csaf_ot
Yokogawa recommends users update Collaborative Information Server (CI Server) up to R1.05.
MitigationFAST/TOOLScisa_csaf_ot
Yokogawa recommends users update Collaborative Information Server (CI Server) up to R1.05.

cvss

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

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · CISA US

v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/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:Xsecondary

v4.04.6mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/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)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-319USCWE-319US

affected products (6)

Products and version ranges known to be affected.

Yokogawa Collaborative Information Server (CI Server): >=R1.01|<=R1.04all versionscisa_csaf_otUS
Yokogawa FAST/TOOLS: >=R9.01|<=R10.04all versionscisa_csaf_otUS
Yokogawa Collaborative Information Server (CI Server)R1.01| → R1.04cisa_csaf_otUS
Yokogawa FAST/TOOLSR9.01| → R10.04cisa_csaf_otUS
Yokogawa Electric Corporation CI Server≤ R1.01 ≤R1.04enisa_euvdEU
Yokogawa Electric Corporation FAST/TOOLS≤ R9.01 ≤R10.04enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-26-176-01Yokogawa FAST/TOOLS and CI Server2026-06-25icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability may return a response containing the CI Server setting information.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot NVD CVE.org MITRE

published 2026-06-23modified 2026-06-23

references (4)

External citations — patches, advisories, analysis.

scry

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