CVE-2020-5801: Rockwellautomation Factorytalk Linx

High severity, CVSS 7.5. EPSS: 25.2% chance of exploitation in the next 30 days.

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 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.