CVE-2022-3166

What it is

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

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

0.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-12-16 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:58 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.7% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-12-16 20:15 UTC

Last modified

2026-06-17 04:58 UTC

Exploit probability

0.7% · EPSS, next 30 days

Weakness

CWE-924

Record status

Modified

Affected

• Rockwellautomation Micrologix 1100 Firmware
• Rockwellautomation Micrologix 1400 Firmware

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-3166.md and follow it. Check whether this project is affected by CVE-2022-3166. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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