CVE-2018-17924: Rockwellautomation 1756-EN2F Series A Firmware

High severity, CVSS 8.6. EPSS: 4.3% chance of exploitation in the next 30 days.

Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could send a CIP connection request to an affected device, and upon successful connection, send a new IP configuration to the affected device even if the controller in the system is set to Hard RUN mode. When the affected device accepts this new IP configuration, a loss of communication occurs between the device and the rest of the system as the system traffic is still attempting to communicate with the device via the overwritten IP address.

Affected products

Rockwellautomation 1756-EN2F Series A Firmware: affected versions not specified
Rockwellautomation 1756-EN2F Series B Firmware: affected versions not specified
Rockwellautomation 1756-EN2F Series C Firmware: up to and including 10.10
Rockwellautomation 1756-EN2T Series A Firmware: affected versions not specified
Rockwellautomation 1756-EN2T Series B Firmware: affected versions not specified
Rockwellautomation 1756-EN2T Series C Firmware: affected versions not specified
Rockwellautomation 1756-EN2T Series D Firmware: up to and including 10.10
Rockwellautomation 1756-EN2TR Series A Firmware: affected versions not specified
Rockwellautomation 1756-EN2TR Series B Firmware: affected versions not specified
Rockwellautomation 1756-EN2TR Series C Firmware: up to and including 10.10
Rockwellautomation 1756-EN3TR Series A Firmware: affected versions not specified
Rockwellautomation 1756-EN3TR Series B Firmware: up to and including 10.10
Rockwellautomation 1756-Enbt Firmware: affected versions not specified
Rockwellautomation 1756-Eweb Series A Firmware: affected versions not specified
Rockwellautomation 1756-Eweb Series B Firmware: affected versions not specified
Rockwellautomation Micrologix 1400 Firmware: affected versions not specified

Published 2018-12-07. Last modified 2026-06-17.