CVE-2020-6984: Rockwellautomation Micrologix 1100 Firmware

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, The cryptographic function utilized to protect the password in MicroLogix is discoverable.

Affected products

• Rockwellautomation Micrologix 1100 Firmware: any version
• Rockwellautomation Micrologix 1400 A Firmware: any version
• Rockwellautomation Micrologix 1400 B Firmware: up to and including 21.001
• Rockwellautomation Rslogix 500: up to and including 12.001

Published 2020-03-16. Last modified 2026-06-17.