How severe is CVE-2026-11833?

CVE-2026-11833 has a CVSS 4.0 base score of 8.2, rated high severity.

Is CVE-2026-11833 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-11833?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-11833 have an EU (EUVD) identifier?

Yes. CVE-2026-11833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38411.

When was CVE-2026-11833 published?

CVE-2026-11833 was published on 2026-06-23.

CVE-2026-11833

CVE-2026-11833 is a high-severity vulnerability with a CVSS 4.0 base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: High (CVSS 4.0 base score 8.2)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38411
Weakness: CWE-319
Published: 2026-06-23
Last modified: 2026-06-23

Description

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

Frequently asked questions

What is CVE-2026-11833?: 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
How severe is CVE-2026-11833?: CVE-2026-11833 has a CVSS 4.0 base score of 8.2, rated high severity.
Is CVE-2026-11833 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-11833?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-11833 have an EU (EUVD) identifier?: Yes. CVE-2026-11833 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38411.
When was CVE-2026-11833 published?: CVE-2026-11833 was published on 2026-06-23.

References

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

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