Rockwell Automation ControlLogix PLC Improper Access Control

Summary

When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication with other connected devices.  Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

Timeline

1. Jan 24, 2013, 9:00 PM UTCCVE published
2. Jun 30, 2025, 9:33 PM UTCRecord last updated
3. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Rockwell Automation 1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules

  All versions

• Rockwell Automation CompactLogix L32E and L35E controllers

  All versions

• Rockwell Automation 1788-ENBT FLEXLogix adapter

  All versions

• Rockwell Automation 1794-AENTR FLEX I/O EtherNet/IP adapter

  All versions

• Rockwell Automation ControlLogix, CompactLogix, GuardLogix, and SoftLogix

  through 18

• Rockwell Automation CompactLogix and SoftLogix controllers

  through 19

• Rockwell Automation ControlLogix and GuardLogix controllers

  through 20

• Rockwell Automation MicroLogix

  1100, 1400

References 5