CVE-2020-6998: Rockwellautomation Armor Compact Guardlogix 5370 Firmware

High severity, CVSS 8.6. EPSS: 2.3% chance of exploitation in the next 30 days.

The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.

Affected products

• Rockwellautomation Armor Compact Guardlogix 5370 Firmware: up to and including 33
• Rockwellautomation Compact Guardlogix 5370 Firmware: up to and including 33
• Rockwellautomation Compactlogix 5370 l1 Firmware: up to and including 33
• Rockwellautomation Compactlogix 5370 l2 Firmware: up to and including 33
• Rockwellautomation Compactlogix 5370 l3 Firmware: up to and including 33
• Rockwellautomation Controllogix 5570 Firmware: up to and including 33
• Rockwellautomation Guardlogix 5560 Firmware: up to and including 33
• Rockwellautomation Guardlogix 5570 Firmware: up to and including 33
• Rockwellautomation Guardlogix 5580 Firmware: up to and including 33

Published 2022-07-27. Last modified 2026-06-17.