CVE-2025-14027 identifies multiple denial-of-service (DoS) vulnerabilities in the Rockwell Automation ControlLogix® Redundancy Enhanced Module, a key component used in industrial control systems (ICS) for redundancy and high availability. The root cause is a memory leak condition classified under CWE-401, where allocated memory is not properly released after its effective lifetime. This leads to resource exhaustion when the device processes certain crafted inputs, including malformed Class 3 messages, which are part of the CIP (Common Industrial Protocol) used in industrial networks. The memory leak and resource exhaustion can cause the module to become unresponsive or enter a major nonrecoverable fault state, disrupting industrial processes. Recovery from such faults typically requires a manual restart, which can cause downtime and operational impact. The vulnerability is remotely exploitable without authentication or user interaction, increasing its risk profile. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) indicates network attack vector, low complexity, no privileges or user interaction required, and high impact on availability. No patches have been released yet, and no exploits are known in the wild, but the vulnerability affects all versions of the product, making all deployments potentially vulnerable.

For European organizations, especially those in manufacturing, energy, utilities, and critical infrastructure sectors that rely on Rockwell Automation ControlLogix® modules, this vulnerability poses a significant risk of operational disruption. A successful exploitation could lead to denial of service, causing production halts, safety system failures, or loss of redundancy in critical control systems. The need for manual restarts to recover can increase downtime and maintenance costs. Given the widespread use of Rockwell Automation products in Europe’s industrial base, the impact could extend to supply chain interruptions and economic consequences. Additionally, the vulnerability could be leveraged as part of a broader attack campaign targeting industrial environments, potentially affecting national infrastructure resilience.

Organizations should immediately implement network segmentation to isolate ControlLogix® modules from untrusted networks, limiting exposure to crafted malicious inputs. Deploy strict input validation and anomaly detection on industrial network traffic to identify and block malformed Class 3 messages or unusual resource consumption patterns. Monitor device logs and network behavior for signs of memory leaks or resource exhaustion. Engage with Rockwell Automation for timely updates and patches once available, and plan for scheduled maintenance windows to apply fixes. Consider deploying redundant systems or failover mechanisms to maintain operational continuity during potential disruptions. Additionally, restrict network access to these modules using firewalls and VPNs, and implement strict access control policies to minimize attack surface.