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 Redundancy Module Configuration Tool from Rockwell Automation is a software utility used to configure and manage ControlLogix® Redundancy Modules (1756-RM2 and 1756-RM3), supporting setup, diagnostics, and maintenance of redundancy systems in critical industrial environments.
Affected Products and Solution
Affected Product |
CVE |
Affected Software Version |
Corrected in Software Version |
Affected Catalog Numbers |
Redundancy Module Configuration Tool |
CVE-2026-9633 |
10.00.00 |
10.01.00 |
None |
Redundancy Module Configuration Tool |
CVE-2026-9634 |
9.00.00 through 10.00.00 |
10.01.00 |
None |
Security Issue Details for CVE-2026-9633
Category |
Details |
CVE ID |
CVE-2026-9633 |
Impact |
A security issue exists within the Redundancy Module Configuration Tool. The RM3ConfigTool.exe binary searches directories in the system path for a required DLL, and one or more of these directories may be writable by standard (non-administrator) users due to incorrect default permissions. If a local attacker places a malicious DLL in such a directory and an administrator subsequently runs the tool, the malicious DLL is loaded into the elevated process and executes with Administrator/SYSTEM privileges.
|
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
|
Known Exploited Vulnerability |
No |
Security Issue Details for CVE-2026-9634
Category |
Details |
CVE ID |
CVE-2026-9634 |
Impact |
A security issue exists within the Redundancy Module Configuration Tool. The RMConfigTool.exe binary searches directories in the system path for a required DLL, and one or more of these directories may be writable by standard (non-administrator) users due to incorrect default permissions. If a local attacker places a malicious DLL in such a directory and an administrator subsequently runs the tool, the malicious DLL is loaded into the elevated process and executes with Administrator/SYSTEM privileges.
|
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
|
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:
· Arbitrary Code Execution: an attacker's ability to run any commands or code of the attacker's choice on a target machine or in a target process
· DLL (Dynamic Link Library): a file containing reusable code and data that can be loaded by Windows applications at runtime to provide shared functionality, reducing redundancy and enabling modular software design.
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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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