CVE-2026-9621

A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover

• CWE-190

• https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html

Published

Sep 1, 2026

Last Modified

Sep 1, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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