Rockwell Automation ControlLogix 5580

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1. EXECUTIVE SUMMARY CVSS v4 8.2 ATTENTION: Exploitable remotely/Low attack complexity Vendor: Rockwell Automation Equipment: ControlLogix 5580 Vulnerability: NULL Pointer Dereference
2. RISK EVALUATION Successful exploitation of this vulnerability could result in a major nonrecoverable fault on the controller.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following version of ControlLogix 5580 is affected: ControlLogix 5580: Version 35.013 3.2 VULNERABILITY OVERVIEW 3.2.1 NULL POINTER DEREFERENCE CWE-476 A denial-of-service vulnerability that exists in the affected product and version. The vulnerability stems from the controller repeatedly attempting to forward messages which could result in a major nonrecoverable fault on the controller. CVE-2025-9166 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). A CVSS v4 score has also been calculated for CVE-2025-9166. A base score of 8.2 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Rockwell Automation reported this vulnerability to CISA.
4. MITIGATIONS Rockwell Automation recommends users to update to version 35.014 or later if possible. If users of the affected software are unable to upgrade the version, security best practices should be applied. For more information, see the Rockwell Automation security advisory. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, 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 this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY September 09, 2025: Initial Republication of Rockwell Automation advisory