Denial-of-Service Vulnerability in Rockwell Automation's Adapter Products
CVE-2026-12659

8.7HIGH

Key Information:

Vendor

Rockwell Automation
Status
The Flex 5000® Ethernet/ip Adapter
Vendor
CVE Published:
14 July 2026

What is CVE-2026-12659?

A denial-of-service vulnerability exists in Rockwell Automation's adapter products due to improper management of exceptional conditions when processing specially crafted CIP packets. This vulnerability can lead to system instability, requiring a power cycle to restore functionality to the affected module and connected I/O devices.

Affected Version(s)

The FLEX 5000® EtherNet/IP Adapter version 6.011

References

https://www.rockwellautomation.com/en-us/trust-center/sec...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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