CVE-2020-5802: Rockwellautomation Factorytalk Linx

High severity, CVSS 7.5. EPSS: 38.8% chance of exploitation in the next 30 days.

An attacker-controlled memory allocation size can be passed to the C++ new operator in RnaDaSvr.dll by sending a specially crafted ConfigureItems message to TCP port 4241. This will cause an unhandled exception, resulting in termination of RSLinxNG.exe. Observed in FactoryTalk 6.11. All versions of FactoryTalk Linx are affected.

Affected products

• Rockwellautomation Factorytalk Linx: up to and including 6.11

Published 2020-12-29. Last modified 2026-06-17.