CVE-2026-12659 HIGH

CVE-2026-12659: Rockwell Automation Flex 5000® Adapter - Denial of Service

Vendor Rockwell Automation
Product The FLEX 5000® EtherNet/IP Adapter
Weakness CWE-415
Published July 14, 2026
Last update July 14, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

A denial-of-service security issue exists in the affected products. The security issue stems from improper handling of exceptional conditions when processing crafted CIP packets sent to the adapter. A power cycle is required to recover the module and associated I/O.

Key dates

02Disclosure timeline

July 14, 2026 CVE published