Summary
Successful exploitation of these vulnerabilities could result in a denial-of-service condition.
The following versions of Rockwell Automation Micro820, Micro850, Micro870 are affected:
- Micro820 (CVE-2025-13823, CVE-2025-13824)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.5 | Rockwell Automation | Rockwell Automation Micro820, Micro850, Micro870 | Dependency on Vulnerable Third-Party Component, Release of Invalid Pointer or Reference |
Background
- Critical Infrastructure Sectors: Critical Manufacturing
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2025-13823
A security issue was found in the IPv6 stack in the Micro850 and Micro870 controllers. This issue occurs when the controllers received multiple malformed packets during fuzzing, causing a recoverable fault.
Affected Products
Rockwell Automation Micro820, Micro850, Micro870
Rockwell Automation
Rockwell Automation Micro820:
known_affected
Remediations
Vendor fix
Rockwell Automation recommends users of Micro820 V14.011 and prior update to newer Micro820 controllers (L20E V23.011 or later).
Mitigation
Rockwell Automation recommends users of Micro850/870 update to V12.013 or later. The update can be downloaded from the Rockwell Automation website.
Mitigation
For CVE-2025-13823, Rockwell Automation advises users to disable IPv6 functionalities if they do not require the feature.
Mitigation
Rockwell Automation users using the affected software, who are not able to upgrade to one of the corrected versions, should follow Rockwell Automation's security best practices.
Mitigation
For more information, please review Rockwell Automation's advisory.
Relevant CWE: CWE-1395 Dependency on Vulnerable Third-Party Component
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVE-2025-13824
A security issue exists due to improper handling of malformed CIP packets during fuzzing. The controller enters a hard fault with a solid red Fault LED and becomes unresponsive. Upon power cycling, the controller will enter a recoverable fault.
Affected Products
Rockwell Automation Micro820, Micro850, Micro870
Rockwell Automation
Rockwell Automation Micro820:
known_affected
Remediations
Vendor fix
Rockwell Automation recommends users of Micro820 V14.011 and prior update to newer Micro820 controllers (L20E V23.011 or later).
Mitigation
Rockwell Automation recommends users of Micro850/870 update to V12.013 or later. The update can be downloaded from the Rockwell Automation website.
Mitigation
Rockwell Automation users using the affected software, who are not able to upgrade to one of the corrected versions, should follow Rockwell Automation's security best practices.
Mitigation
For more information, please review Rockwell Automation's advisory.
Relevant CWE: CWE-763 Release of Invalid Pointer or Reference
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Acknowledgments
- Rockwell Automation reported these vulnerabilities to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:
Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls and isolating them from business networks.
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
Revision History
- Initial Release Date: 2025-12-18
| Date | Revision | Summary |
|---|---|---|
| 2025-12-18 | 1 | Initial Republication |