CVE-2025-9177 Rockwell Automation CVE debrief

Who should care

OT and ICS teams running Rockwell Automation 1715 EtherNet/IP Comms Module deployments, especially environments where the device web interface is used for administration or monitoring. Network defenders and plant engineers should care most about exposed or reachable management interfaces.

Technical summary

The published advisory describes a network-reachable availability issue with CVSS v3.1 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Excessive request traffic to the web server can cause a crash. The advisory explicitly says the condition does not affect I/O control or communication, but recovery of the webpage requires a power cycle. Rockwell Automation identifies 3.011 and later as the corrected version.

Defensive priority

High for systems with reachable management interfaces. While the impact is limited to web server availability, the issue can still disrupt operator visibility and device administration until the unit is restarted.

Recommended defensive actions

• Check whether any deployed 1715 EtherNet/IP Comms Module instances are running versions earlier than the corrected 3.011 release.
• Apply Rockwell Automation’s corrected version 3.011 or later where operationally feasible.
• If upgrading is not immediately possible, follow Rockwell Automation’s security best practices for the affected product.
• Limit exposure of the device web interface to trusted management networks only.
• Monitor for abnormal request rates or repeated failures of the module web interface.
• Plan maintenance procedures that include a power cycle if the webpage becomes unavailable and recovery is needed.

Evidence notes

The supplied CISA CSAF advisory for ICSA-25-287-01 states that the issue stems from a high number of requests sent to the web server and that a power cycle is required to recover webpage access. The advisory also states that I/O control and communication are not impacted. The provided CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Official resources