CVE-2018-17896: Yokogawa Fcj Firmware

High severity, CVSS 8.1. EPSS: 1.2% chance of exploitation in the next 30 days.

Yokogawa STARDOM Controllers FCJ, FCN-100, FCN-RTU, FCN-500, All versions R4.10 and prior, The affected controllers utilize hard-coded credentials which may allow an attacker gain unauthorized access to the maintenance functions and obtain or modify information. This attack can be executed only during maintenance work.

Affected products

• Yokogawa Fcj Firmware: up to and including r4.10
• Yokogawa Fcn-100 Firmware: up to and including r4.10
• Yokogawa Fcn-500 Firmware: up to and including r4.10
• Yokogawa Fcn-Rtu Firmware: up to and including r4.10

Published 2018-10-12. Last modified 2026-06-17.