What is CVE-2025-66606?

CVE-2025-66606 is a critical-severity vulnerability in Yokogawa Fast\/tools, classified under CWE-86. CVSS score: 9.6/10. Published 2026-02-09.

How severe is CVE-2025-66606?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Yokogawa Fast\/tools

CVE-2025-66606

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product does not properly encode URLs. An attacker could tamper with web pages or execute malicious scripts. The affected products and versi…

EPSS: 0.002 (12.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

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

Weakness classification (CWE)

CWE-86

References

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

Frequently asked questions

What is CVE-2025-66606?: CVE-2025-66606 is a critical-severity vulnerability in Yokogawa Fast\/tools, classified under CWE-86. CVSS score: 9.6/10. Published 2026-02-09.
How severe is CVE-2025-66606?: Critical severity. CVSS v3 base score is 9.6 out of 10.