CVE-2026-9637: Rockwell Automation Compactlogix 5380 / Controllogix 5580

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover

Affected products

Published 2026-09-01. Last modified 2026-09-01.