CVE-2021-33012

CVE-2021-33012

Vendor N/A
Product Rockwell Automation MicroLogix 1100
Weakness CWE-20 · Input validation
Published July 9, 2021
Last update June 3, 2026

CVSS base score

What the vulnerability does

01Description

Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause the PLC to fault when the controller is switched to RUN mode, which results in a denial-of-service condition. If successfully exploited, this vulnerability will cause the controller to fault whenever the controller is switched to RUN mode.

Key dates

02Disclosure timeline

July 9, 2021 CVE published
June 3, 2026 Record updated