CVE-2019-18269: Omron PLC Cj Firmware

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.

Affected products

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

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