CVE-2026-12659

HIGH

Rockwell Automation Flex 5000® Adapter - Denial of Service

Title source: cna

Description

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.

References (1)

Core 1

Core References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1789.html

Scores

CVSS v4 8.7

EPSS 0.0032

EPSS Percentile 24.5%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-415

Status published

Products (1)

Rockwell Automation/The FLEX 5000® EtherNet/IP Adapter version 6.011

Published Jul 14, 2026

Tracked Since Jul 14, 2026