The security of our products is important to us as your industrial automation supplier. This security issue was found internally during routine testing and is being reported based on our commitment to customer transparency and improvement of all business environments.
Product Description
The 1719-AENTR from Rockwell Automation is an EtherNet/IP adapter for the 1719 Ex I/O system, enabling distributed I/O communication over EtherNet/IP in hazardous location environments. It serves as the network interface between 1719 Ex I/O modules and the control system.
Affected Products and Solution
Affected Product |
CVE |
Affected Firmware Version |
Corrected in Software Version |
Affected Catalog Numbers |
1718/ 1719 Ex I/O EtherNet/IP Adapter
|
CVE-2026-9140 |
3.011 |
3.012 |
1718-AENTR/ 1719-AENTR |
Security Issue Details for CVE-2026-9140
Category |
Details |
CVE ID |
CVE-2026-9140 |
Impact |
A denial-of-service security issue exists in the 1719-AENTR. The security issue stems from improper handling of a UDP unicast network storm, which causes the device to become overloaded and lose communication. A power cycle is required to recover. |
CVSS 3.1 Base Score |
|
CVSS 4.0 Base Score |
|
CWE |
CWE-770: Allocation of Resources Without Limits or Throttling |
Known Exploited Vulnerability |
No |
Mitigations and Workarounds
Customers using the affected software, who are not able to upgrade to one of the corrected versions, should use our security best practices.
Revision History
Revision |
Date |
Description |
1.0 |
7/14//26 |
Initial release |
Glossary:
- Denial-of-Service (DoS): An attack that disrupts the normal functioning of a system, often by overwhelming it with requests.
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Support
If you have any questions regarding the security issue(s) above and how to mitigate them, contact TechConnect for help. More information can be found at Contact Us | Rockwell Automation | US.
If you have any questions regarding this disclosure, please contact PSIRT
Email: rasecure@ra.rockwell.com
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