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CVE-2026-11833 Yokogawa Electric Corporation CVE debrief

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 FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04 and CI Server (All packages) R1.01 to R1.04. The CVSS score for this vulnerability is 8.2, indicating a high severity. The CVE was published on 2026-06-23T02:16:30.917Z and last modified on 2026-06-23T15:06:20.217Z.

Vendor
Yokogawa Electric Corporation
Product
FAST/TOOLS
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-25
Original CVE updated
2026-06-25
Advisory published
2026-06-25
Advisory updated
2026-06-25

Who should care

Organizations using FAST/TOOLS and CI Server should be aware of this vulnerability and take necessary actions to mitigate it. The vulnerability could allow an attacker to exploit CI Server setting information, potentially leading to further attacks. It is essential to review the affected products and versions to determine if any updates or patches are required.

Technical summary

The vulnerability in FAST/TOOLS and CI Server allows an attacker to exploit CI Server setting information. The affected products and versions are FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04 and CI Server (All packages) R1.01 to R1.04. The CVSS score for this vulnerability is 8.2, indicating a high severity. The CWE-319 weakness is associated with this vulnerability.

Defensive priority

High priority should be given to patching or updating the affected FAST/TOOLS and CI Server products. Organizations should review their inventory and apply necessary updates to prevent exploitation.

Recommended defensive actions

  • Review the affected products and versions to determine if any updates or patches are required.
  • Apply necessary updates or patches to prevent exploitation.
  • Monitor the system for any suspicious activity.
  • Consider implementing additional security measures to prevent similar attacks.
  • Review and update incident response plans to ensure preparedness in case of an attack.

Evidence notes

The CVE-2026-11833 vulnerability was published on 2026-06-23T02:16:30.917Z and last modified on 2026-06-23T15:06:20.217Z. The CVSS score for this vulnerability is 8.2, indicating a high severity. The CWE-319 weakness is associated with this vulnerability. The affected products and versions are FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04 and CI Server (All packages) R1.01 to R1.04.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11833 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11833

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11833 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11833

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://web-material3.yokogawa.com/1/39777/files/YSAR-26-0004-E.pdf

    7168b535-132a-4efe-a076-338f829b2eb9

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.