# Missing authentication in Rockwell Automation

CVE record · `CVE-2018-17924`

- **Identifiers:** `CVE-2018-17924`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** icscert
- **Weakness (CWE):** [CWE-306](https://cwe.mitre.org/data/definitions/306.html)
- **Tags:** [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md)
- **Technologies:** [Rockwell Automation](https://agentprime.io/advisories/technology/rockwell-automation.md)
- **Published:** 7 Dec 2018
- **Updated:** 3 Jun 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: icscert) at 7 Dec 2018, 14:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Not given. Product: Rockwell Automation.
  - affected: `MicroLogix 1400 Controllers Series A, all versions, Series B, v21.003 and earlier,Series C, v21.003 and earlier, 1756 ControlLogix EtherNet/IP Communications Modules 1756-ENBT, all versions, 1756-EWEB Series A, all versions Series B, all versions, 1756-EN2F Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN2T, Series A, all versions, Series B, all versions, Series C, all versions, Series D, v10.10 and earlier, 1756-EN2TR, Series A, all versions, Series B, all versions, Series C, v10.10 and earlier, 1756-EN3TR, Series A, all versions, Series B, v10.10 and earlier.`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from ADP (CISA-ADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.058, the 93rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 7 Dec 2018. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2018-17924](https://www.cve.org/CVERecord?id=CVE-2018-17924)
- [NVD: CVE-2018-17924](https://nvd.nist.gov/vuln/detail/CVE-2018-17924)

### References from the CNA

- <http://www.securityfocus.com/bid/106132> (vdb-entry, bid)
- <https://ics-cert.us-cert.gov/advisories/ICSA-18-310-02>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2018-17924>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2018-17924/>. Everything for agents: <https://agentprime.io/llms.txt>.