CVE-2025-66597

CVSS 8.8v4.0pub. 2026-02-09upd. 2026-03-06

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports weak cryptographic algorithms, potentially allowing an attacker to decrypt communications with the web server. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Yokogawa Fast\/tools
APP
Yokogawa
r9.01 – r10.04

🔵

CHECK WITH VENDOR

No clear patch data available. Check vendor references.

CWE

CWE-327

References

web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E…

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CVE-2025-66597

Yokogawa Fast\/tools

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