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Vulnerability record · CVE-2018-17924 · published 7 December 2018

CVE-2018-17924: Rockwellautomation micrologix 1400 firmware missing authentication for critical function vulnerability

Rockwellautomation · Micrologix 1400 Firmware

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.

8.6 CVSS 3.1 High EPSS 4.3% · top 9.1% CWE-306 · Missing authentication for critical function
8.6CVSS 3.1 base score, v2 7.8
4.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

16 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/106132 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02 MitigationThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/106132 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02 MitigationThird Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-17924), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.