AlertsMicrosoft Security Advisory – September 2021 Monthly Rollup - UPDATE 1

Number: AV21-461
Date: 14 September 2021
Update: 17 September 202


On 14 September 2021 Microsoft published Security Updates to address vulnerabilities in multiple products. Included were critical updates for the following:

  • Azure Open Management Infrastructure
  • Windows 7, 8.1, RT 8.1 and 10
  • Windows Server version 20H2 and version 2004
  • Windows Server 2008, 2008 R2, 2012, 2012 R2, 2016, 2019 and 2022

Exploitation of some of these vulnerabilities could allow an actor to execute code remotely.


On 16 September 2021 the Microsoft Security Response Center published a blog post to provide additional guidance related to the Open Management Infrastructure (OMI) vulnerabilities within Azure VM Management Extensions.

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

September 2021 Release Notes

Security Update Guide

UPDATE 1 – MSRC - Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions

Note to Readers 

The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment.  We are Canada’s national authority on cyber security and we lead the government’s response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.

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