No exploitation reported

CVE-2018-17924

No exploitation reported by the sources we read.

Published2018-12-07
WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2018-12-0714:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-17924?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-17924?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Rockwellautomation 1756-en2f series a firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Rockwellautomation 1756-en2f series b firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Rockwellautomation 1756-en2f series c firmwareversion to verify

Branch	Affected	Fixed in	Source
10.10	≤ 10.10	no fix published	NVD

13 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-18-310-02 CISA18 known affected
Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules
1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2TR Series A: all versions · 1756 ControlLogix EtherNet/IP Communications Modules 1756-EN2T Series D: v10.10 and earlier · 1756 ControlLogix EtherNet/IP Communications Modules 1756-EWEB Series B: all versions · +15 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-18-310-02 · 18 productsFor MicroLogix 1400 Controllers 1766-Lxxx, Series B or C, apply FRN 21.004 and later. Once the new FRN is applied, use the LCD Display to put the controller in RUN mode to prevent configuration changes. See p. 115 of the MicroLogix 1400 Programmable Controllers User Manual (1766-UM001M-EN-P) for de…
Mitigation from the vendor CISA ICSA-18-310-02 · 18 productsThe download for FRN 21.004 can be found at the following location:
Mitigation from the vendor CISA ICSA-18-310-02 · 18 products1756 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.…
Mitigation from the vendor CISA ICSA-18-310-02 · 18 products1756 ControlLogix EtherNet/IP Communications Modules, 1756-EN2F, Series C, 1756-EN2T, Series D, 1756-EN2TR, Series C, 1756-EN3TR, Series B. The recommendations are to apply FRN 11.001 and later. Once the new FRN is applied, enable Explicit Protected Mode. See p. 32 of the EtherNet/IP Network Config…
Mitigation from the vendor CISA ICSA-18-310-02 · 18 productsThe download for FRN 11.001 can be found at the following location:
Mitigation from the vendor CISA ICSA-18-310-02 · 18 productsUtilize proper network infrastructure controls, such as firewalls, to help ensure that EtherNet/IP messages from unauthorized sources are blocked.

Advisories and patches

ics-cert.us-cert.govMitigation

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-06-03
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52026-06-03
NVDCVSS 3.18.6read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
CNAweakness (CWE)CWE-306read 2026-10-23
NVDweakness (CWE)CWE-306read 2026-10-23
FIRST EPSSEPSS score4.3 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published: 2018-12-07
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-17924?

Is CVE-2018-17924 actively exploited?

Active exploitation of CVE-2018-17924 has not been confirmed. Its EPSS score was 4.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-17924?

CVE-2018-17924 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

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