How severe is CVE-2025-66594?

CVE-2025-66594 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-66594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66594?

CVE-2025-66594 affects Yokogawa Fast/tools. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66594?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66594 have an EU (EUVD) identifier?

Yes. CVE-2025-66594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207179.

When was CVE-2025-66594 published?

CVE-2025-66594 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2025-66594

CVE-2025-66594 is a medium-severity vulnerability in Yokogawa Fast/tools with a CVSS 3.x base score of 5.3. 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-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207179
Weakness: CWE-209
Affected product: Yokogawa Fast/tools
Published: 2026-02-09
Last modified: 2026-06-17

Description

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. Detailed messages are displayed on the error page. 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

Frequently asked questions

What is CVE-2025-66594?: A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. Detailed messages are displayed on the error page. 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
How severe is CVE-2025-66594?: CVE-2025-66594 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-66594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66594?: CVE-2025-66594 affects Yokogawa Fast/tools. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66594 have an EU (EUVD) identifier?: Yes. CVE-2025-66594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207179.
When was CVE-2025-66594 published?: CVE-2025-66594 was published on 2026-02-09 and last updated on 2026-06-17.

References

https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf

Affected products (1)

cpe:2.3:a:yokogawa:fast\/tools:*:*:*:*:*:*:*:*

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