Successful exploitation of this vulnerability could crash the module. The device requires a restart to recover.
The following versions of Rockwell Automation 1756-ENBT Module are affected:
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.5 | Rockwell Automation | Rockwell Automation 1756-ENBT Module | Improper Check for Unusual or Exceptional Conditions |
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A denial-of-service security issue exists in the Rockwell Automation 1756-ENBT module which is a ControlLogix EtherNet/IP bridge that enables communication between Logix 5000 controllers and Ethernet devices. An attacker could exploit this vulnerability by sending a crafted CIP packet, causing the module to crash. The device requires a restart to recover.
Vendor:
Rockwell Automation
Product Version:
Rockwell Automation 1756-ENBT module: vers:all/*
Product Status:
known_affected
Relevant CWE: CWE-754 Improper Check for Unusual or Exceptional Conditions
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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.
| Date | Revision | Summary |
|---|---|---|
| 2026-09-03 | 1 | Initial Republication of Rockwell Automation security advisory. |
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