CVE-2020-6980: Rockwellautomation Micrologix 1100 Firmware

Low severity, CVSS 3.3. EPSS: 0.4% 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, If Simple Mail Transfer Protocol (SMTP) account data is saved in RSLogix 500, a local attacker with access to a victim’s project may be able to gather SMTP server authentication data as it is written to the project file in cleartext.

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.