Micro820®, Micro850®, Micro870® – Specialized Fuzzing Vulnerabilities
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 Rockwell Micro800™ series is a family of compact, cost-effective programmable logic controllers designed for standalone machines, offering scalable control with flexible communication options, plug-in and expansion modules, and easy programming through Connected Components Workbench software.
Affected Products and Solution
Affected Product |
CVE |
Affected Firmware Version |
Corrected in Firmware Version |
Affected Catalog Numbers |
Micro850/870 (L50E/L70E) |
CVE-2025-13823 |
V23.011 |
||
Micro850/870 (L50E/L70E) |
CVE-2025-13824 |
V23.011 |
||
Micro850/870 (LC50/LC70) |
CVE-2025-13824 |
V12.013 and lower
|
Migrate to the newer Micro850/870 controllers (L50E/L70E V23.012) |
|
Micro820 (LC20)
|
CVE-2025-13824
|
V14.011 and lower
|
Migrate to the newer Micro820 controllers (L20E V23.011)
|
Security Issue Details for CVE-2025-13823
Category |
Details |
CVE ID |
CVE-2025-13823 |
Impact |
A security issue was found in the IPv6 stack in the Micro850 and Micro870 controllers when the controllers received multiple malformed packets during fuzzing. The controllers will go into recoverable fault with fault code 0xFE60. To recover the controller, clear the fault. |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
|
Known Exploited Vulnerability |
No (Not listed in KEV database) |
Security Issue Details for CVE-2025-13824
Category |
Details |
CVE ID |
CVE-2025-13824 |
Impact |
A security issue exists due to improper handling of malformed CIP packets during fuzzing. The controller enters a hard fault with solid red Fault LED and becomes unresponsive. Upon power cycle, the controller will enter recoverable fault where the MS LED and Fault LED become flashing red and reports fault code 0xF019. To recover, clear the fault. |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
CWE-763: Release of Invalid Pointer or Reference |
Known Exploited Vulnerability |
No (Not listed in KEV database) |
Mitigations and Workarounds
For CVE-2025-13823, customers are advised to disable IPv6 functionalities if they do not require this feature. 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 |
12/15/2025 |
Initial release |
Glossary
· IPv6: Internet protocol that uses 128-bit addresses to allow more devices to connect and improve network efficiency compared to IPv4
· Recoverable Fault: an error or failure in a system that can be corrected without stopping or restarting the entire system, allowing normal operation to continue after recovery actions are taken.
· CIP Packet: data structure used in the Common Industrial Protocol (CIP) to encapsulate information for communication between industrial devices, including commands, responses, and associated parameters for control and data exchange.
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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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