CVE-2026-0646: Rockwell Automation Flex I/o Ethernet/ip Adapters

High severity, CVSS 8.7. EPSS: 0.3% chance of exploitation in the next 30 days.

A denial-of-service security issue exists within the 1794-AENTR adapter due to improper memory handling of CIP protocol requests. This vulnerability can result in the adapter faulting and losing connection to its associated I/O modules, requiring a manual reset to recover.

Affected products

• Rockwell Automation Flex I/o Ethernet/ip Adapters: version 2.012 only

Published 2026-06-16. Last modified 2026-06-17.