CVE-2018-14821: Rockwellautomation Rslinx

High severity, CVSS 7.5. EPSS: 4.5% chance of exploitation in the next 30 days.

Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote, unauthenticated threat actor to intentionally send a malformed CIP packet to Port 44818, causing the RSLinx Classic application to terminate. The user will need to manually restart the software to regain functionality.

Affected products

• Rockwellautomation Rslinx: up to and including 4.00.01

Published 2018-09-20. Last modified 2026-06-17.