AC 800M MMS DoS Vulnerability Cyber Security Advisory

This document is a cyber security advisory from ABB detailing a Denial of Service (DoS) vulnerability (CVE-2021-22277) in the MMS protocol stack affecting multiple AC 800M controller firmware versions and related products. It outlines affected products, planned remediation versions, and provides a CVSS v3.1 base score of 7.5 (High), advising customers to upgrade to unaffected versions.