CVE-2025-9466: Rockwellautomation Armorstart Lt Firmware

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A security issue exists within ArmorStart® LT that can result in a denial-of-service condition. During execution of the Achilles EtherNet/IP and CIP grammar tests, the device reboots unexpectedly, causing the Link State Monitor to go down for several seconds.

Affected products

• Rockwellautomation Armorstart Lt Firmware: up to and including 2.002

Published 2026-01-20. Last modified 2026-06-17.