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Fencer Intel
high 7.5

CVE-2018-17924 json

Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could…

published 7y ago modified 4mo ago also EUVD-2018-9665

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
5.8%
EPSS 5.8% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-310-02 updated cvss 8.6

Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules

  • Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2F Series A <= 10.10 Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2F Series B Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series A Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series B Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series C Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series D <= 10.10
    +11 more products
    Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series A Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series B Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series C <= 10.10 Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN3TR Series A Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN3TR Series B <= 10.10 Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-ENBT Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EWEB Series A Rockwell Automation 1756 ControlLogix EtherNet/IP Communications Modules 1756-EWEB Series B Rockwell Automation MicroLogix 1400 Controllers Series A Rockwell Automation MicroLogix 1400 Controllers Series B <= 21.003 Rockwell Automation MicroLogix 1400 Controllers Series C <= 21.003
    affected: mitigation “The download for FRN 21.004 can be found at the following location:” literature.rockwellautomation.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5mo ago

Exploit prediction

5.85% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • n/a Rockwell Automation

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.