CVE-2017-12093: Rockwellautomation Micrologix 1400 B Firmware

Medium severity, CVSS 5.3. EPSS: 6% chance of exploitation in the next 30 days.

An exploitable insufficient resource pool vulnerability exists in the session communication functionality of Allen Bradley Micrologix 1400 Series B Firmware 21.2 and before. A specially crafted stream of packets can cause a flood of the session resource pool resulting in legitimate connections to the PLC being disconnected. An attacker can send unauthenticated packets to trigger this vulnerability.

Affected products

• Rockwellautomation Micrologix 1400 B Firmware: up to and including 21.2

Published 2018-04-05. Last modified 2026-06-17.