The security of our products is important to us as your industrial automation supplier. This security issue is being reported based on our commitment to customer transparency and improvement of all business environments.
Product Description
RSLinx ® Classic permits 3rd-party software to access data from Rockwell Automation controllers using OPC DA or DDE interface. The software is well suited to work with older software and systems containing older hardware and networks.
Affected Products and Solution
Affected Product |
CVE |
Affected Software Version |
Corrected in Software Version |
RSLinx® Classic |
CVE-2020-13573 |
4.50.00 and earlier |
Security Issue Details for CVE-2020-13573
Category |
Details |
CVE ID |
CVE-2020-13573 |
Impact |
A denial-of-service vulnerability exists in the Ethernet/IP server functionality of RSLinx Classic. A specially crafted network request can lead to a denial of service. If exploited, the application will become unresponsive and will not recover on its own. A user would need to manually restart RSLinx Classic to restore normal operation. |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
|
Known Exploited Vulnerability |
No (Not listed in KEV database) |
Mitigations and Workarounds
Customers using the affected software, who are not able to upgrade to one of the corrected versions, should consider applying the available patch (BF31213) for their current version or applying the recommended security best practices.
Revision History
Revision |
Date |
Description |
1.0 |
06/16/2026 |
Initial release |
Glossary:
· Denial of Service (DoS): A malicious attempt to disrupt the normal functioning of a targeted server, service, or network by overwhelming it with a flood of traffic or triggering a crash.
· OPC DA (OPC Data Access): A client-server communication standard used in industrial automation that enables real-time exchange of process data between control devices and software applications.
· DDE (Dynamic Data Exchange): A legacy inter-process communication protocol used in Windows-based applications to share data between programs in real time.
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Support
If you have any questions regarding the security issue(s) above and how to mitigate them, contact TechConnect for help. More information can be found at Contact Us | Rockwell Automation | US.
If you have any questions regarding this disclosure, please contact PSIRT
Email: rasecure@ra.rockwell.com
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