The security of our products is important to us as your industrial automation supplier. This security issue was found internally during routine testing and is being reported based on our commitment to customer transparency and improvement of all business environments.
Product Description
Controllers from Rockwell Automation deliver high-speed, multi-discipline control for discrete, motion, process, and safety applications, featuring enhanced security, integrated motion over EtherNet/IP.
Affected Products and Solution
Affected Product |
CVE |
Affected Firmware Version |
Corrected in Firmware Version |
Affected Catalog Numbers |
ControlLogix® 5580 GuardLogix 5580 CompactLogix® 5380 Compact GuardLogix® 5380 CompactLogix® 5480
|
CVE-2021-42260 |
Versions prior to 36.013, Versions prior to 35.014, Versions prior to 34.015
|
Version 37.011 and later, Version 36.013 and later, Version 35.014 and later, Version 34.015 and later |
1756-L8z |
Security Issue Details
Category |
Details |
CVE ID |
CVE-2021-42260 |
Impact |
A potential denial of service security issue exists in the affected products and can be triggered via corrupt crafted data. This could result in a major non-recoverable fault (MNRF). A program download is required to recover safety controllers. For non-safety controllers a stage 2 reset is required to recover see chapter 5 for instructions. |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') |
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 use our security best practices.
Revision History
Revision |
Date |
Description |
1.0 |
November 11, 2025 |
Initial release |
Glossary:
Denial of Service (DoS): Attack is 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.
Major Non-Recoverable Fault (MNRF): an error that occurs in a system or device and prevents it from recovering or functioning properly.
Get Up-to-Date Product Security Information
Visit the Rockwell Automation security advisories on the Trust Center page to:
· Subscribe to product security alerts
· Review the current list of Rockwell Automation security advisories
· Report a possible security issue in a Rockwell Automation product
· Learn more about the vulnerability policy
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
Legal Disclaimer
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