PT-2026-49707 · Rockwell Automation · Flex I/O Ethernet/Ip Adapters

Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-0646

NVD

CVSS v4.0

8.7

High

Base vector

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

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.

Fix

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-0646

Affected Products

Flex I/O Ethernet/Ip Adapters

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-0646 · Security Note
• https://rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1775.html · Note