CVE-2019-13533: Omron PLC Cj Firmware

High severity, CVSS 8.1. EPSS: 0.9% chance of exploitation in the next 30 days.

In Omron PLC CJ series, all versions, and Omron PLC CS series, all versions, an attacker could monitor traffic between the PLC and the controller and replay requests that could result in the opening and closing of industrial valves.

Affected products

  • Omron PLC Cj Firmware: any version
  • Omron PLC Cs Firmware: any version

Published 2019-12-16. Last modified 2026-06-17.