What is CVE-2025-66598?

CVE-2025-66598 is a high-severity vulnerability in Yokogawa Fast\/tools, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2026-02-09.

How severe is CVE-2025-66598?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Yokogawa Fast\/tools

CVE-2025-66598

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports old SSL/TLS versions, potentially allowing an attacker to decrypt communications with the web server. The affected products…

Vulnerability class: POODLE (CVE-2014-3566)

EPSS: 0.002 (4.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Yokogawa Fast\/tools
Yokogawa Electric Corporation Fast/tools — versions R9.01

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

7168b535-132a-4efe-a076-338f829b2eb9 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-66598?: CVE-2025-66598 is a high-severity vulnerability in Yokogawa Fast\/tools, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 7.5/10. Published 2026-02-09.
How severe is CVE-2025-66598?: High severity. CVSS v3 base score is 7.5 out of 10.