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
The Logix® Platform of products listed below from Rockwell Automation delivers 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 |
CVE-2026-9637 |
V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012
|
V37.011, 36.013, 35.014, 34.015 |
|
CompactLogix® 5380 |
CVE-2026-9637 |
V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012
|
V37.011, 36.013, 35.014, 34.015 |
|
GuardLogix 5580 |
CVE-2026-9637 |
V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012
|
V37.011, 36.013, 35.014, 34.015 |
|
Compact GuardLogix 5380 |
CVE-2026-9637 |
V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012
|
V37.011, 36.013, 35.014, 34.015 |
|
Security Issue Details for CVE-2026-9637
Category |
Details |
CVE ID |
CVE-2026-9637 |
Impact |
A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer |
Known Exploited Vulnerability |
No |
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 |
9/1/2026 |
Initial release |
Glossary:
· CIP Communication: Common Industrial Protocol (CIP) is a common communication standard that is widely used in industrial automation. Comprises a series of protocols for communication between different devices and systems in automation technology.
· Denial-of-Service (DoS): An attack that disrupts the normal functioning of a system, often by overwhelming it with requests.
· Major Nonrecoverable Fault (MNRF): an error that occurs in a system or device and prevents it from recovering or functioning properly.
· Buffer Overflow: when a program writes more data to a buffer than it can hold, causing the excess data to overflow into adjacent memory locations.
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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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