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Vulnerability record · CVE-2020-5801 · published 29 December 2020

CVE-2020-5801: Rockwellautomation factorytalk linx vulnerability

Rockwellautomation · Factorytalk Linx

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.

7.5 CVSS 3.1 High EPSS 25% · top 2.1% CWE-755 · CWE-755
7.5CVSS 3.1 base score, v2 5.0
25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tenable.com/security/research/tra-2020-71 Third Party Advisory
https://www.tenable.com/security/research/tra-2020-71 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-27251Rockwellautomation factorytalk linx heap-based buffer overflow vulnerabilityA heap overflow vulnerability exists within FactoryTalk Linx Version 6.11 and prior. This vulnerability could allow a remote, unauthenticated attacke…EPSS 6.8%9.8CVE-2020-12001Rockwellautomation factorytalk linx improper input validation vulnerabilityFactoryTalk Linx versions 6.00, 6.10, and 6.11, RSLinx Classic v4.11.00 and prior,Connected Components Workbench: Version 12 and prior, ControlFLASH:…EPSS 12%9.1CVE-2023-29464Rockwellautomation factorytalk linx improper input validation vulnerabilityFactoryTalk Linx, in the Rockwell Automation PanelView Plus, allows an unauthenticated threat actor to read data from memory via crafted malicious pa…EPSS 9.6%8.5CVE-2025-9068Rockwellautomation factorytalk linx improper privilege management vulnerabilityA security issue exists within the Rockwell Automation Driver Package x64 Microsoft Installer File (MSI) repair functionality, installed with FTLinx.…EPSS 0.18%8.5CVE-2025-9067Rockwellautomation factorytalk linx improper privilege management vulnerabilityA security issue exists within the x86 Microsoft Installer File (MSI), installed with FTLinx. Authenticated attackers with valid Windows user credent…EPSS 0.18%8.4CVE-2025-7972Rockwellautomation factorytalk linx vulnerabilityA security issue exists within the FactoryTalk Linx Network Browser. By modifying the process.env.NODE_ENV to ‘development’, the attacker can disable…EPSS 0.50%8.1CVE-2020-11999Rockwellautomation factorytalk linx improper input validation vulnerabilityFactoryTalk Linx versions 6.00, 6.10, and 6.11, RSLinx Classic v4.11.00 and prior,Connected Components Workbench: Version 12 and prior, ControlFLASH:…EPSS 2.8%7.5CVE-2020-5802Rockwellautomation factorytalk linx allocation without limits vulnerabilityAn attacker-controlled memory allocation size can be passed to the C++ new operator in RnaDaSvr.dll by sending a specially crafted ConfigureItems mes…EPSS 39%

Source: NIST National Vulnerability Database (record CVE-2020-5801), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.