CVE-2018-17924

highpriority · track · 36OT risk · elevatedEPSS 0.043 · 91 %ileEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
4.33% (91st) EPSS
CVSS 7.8 · high
Is it mine?
69 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2F Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2F Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series Ccisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series Dcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series Ccisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN3TR Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EN3TR Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-ENBTcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EWEB Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • Mitigation1756 ControlLogix EtherNet/IP Communications Modules 1756-EWEB Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • MitigationMicroLogix 1400 Controllers Series Acisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • MitigationMicroLogix 1400 Controllers Series Bcisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

  • MitigationMicroLogix 1400 Controllers Series Ccisa_csaf_ot

    1756 ControlLogix EtherNet/IP Communications Modules, 1756-ENBT, all versions, 1756-EN2F Series A, all versions, Series B, all versions. 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions. 1756-EN2TR Series A, all versions, Series B, all versions. 1756-EN3TR Series A. No direct mitigation provided. See additional mitigating recommendations below for suggested actions.

02

cvss

Technical severity, 0–10. One row per scoring source.

8.6
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4
v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · CISA US
v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6
v3.17.9highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306USCWE-306US
05

affected products (69)

Products and version ranges known to be affected.

showing 20 of 69
06

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-18-310-02Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules2018-11-06icsa · cisa_csaf_otUS

    Successful exploitation of this vulnerability could allow an unauthenticated attacker to modify system settings and cause a loss of communication between the device and the system.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otNVDCVE.orgMITRE
published 2018-12-07modified 2026-06-17
10

references (7)

External citations — patches, advisories, analysis.

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