CVE-2018-17924

Severity: high (CVSS 8.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-07 · updated 2026-06-17
Weakness: CWE-306

Description

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: all versions
Rockwellautomation 1756-En2F Series B Firmware: all versions
Rockwellautomation 1756-En2F Series C Firmware: through 10.10
Rockwellautomation 1756-En2T Series A Firmware: all versions
Rockwellautomation 1756-En2T Series B Firmware: all versions
Rockwellautomation 1756-En2T Series C Firmware: all versions
Rockwellautomation 1756-En2T Series D Firmware: through 10.10
Rockwellautomation 1756-En2Tr Series A Firmware: all versions
Rockwellautomation 1756-En2Tr Series B Firmware: all versions
Rockwellautomation 1756-En2Tr Series C Firmware: through 10.10
Rockwellautomation 1756-En3Tr Series A Firmware: all versions
Rockwellautomation 1756-En3Tr Series B Firmware: through 10.10
Rockwellautomation 1756-Enbt Firmware: all versions
Rockwellautomation 1756-Eweb Series A Firmware: all versions
Rockwellautomation 1756-Eweb Series B Firmware: all versions
Rockwell Automation MicroLogix 1400: all versions

References

Get alerted when CVE-2018-17924 or the next vulnerability affects your stack