CVE-2026-0646

HIGH

Rockwell FLEX I/O 1794-AENTR v2.012 - CIP Request Denial of Service

Title source: manual

Description

A denial-of-service security issue exists within the 1794-AENTR adapter due to improper memory handling of CIP protocol requests. This vulnerability can result in the adapter faulting and losing connection to its associated I/O modules, requiring a manual reset to recover.

References (1)

Core 1

Core References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1775.html

Scores

CVSS v4 8.7

EPSS 0.0034

EPSS Percentile 26.9%

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-401

Status published

Products (1)

Rockwell Automation/FLEX I/O EtherNet/IP Adapters 2.012

Published Jun 16, 2026

Tracked Since Jun 16, 2026