AlertsMicrosoft Security Advisory – November 2021 Monthly Rollup

Number: AV21-576
Date: 10 November 2021

On 9 November 2021 Microsoft published Security Updates to address vulnerabilities in multiple products. Included were critical updates for the following:

  • Microsoft Dynamics 365
  • Microsoft Malware Protection Engine
  • Microsoft Visual Studio 2017 and 2019
  • Remote Desktop client for Windows Desktop
  • Windows 7, 8.1, RT 8.1, 10 and 11
  • Windows Server 2008, 2008 R2, 2012, 2012 R2, 2016, 2019 and 2022  
  • Windows Server Core 2012, 2012 R2, 2016, 2019, 2022, 20H2 and 2004

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

Of note, Microsoft has indicated that exploitation has been detected for the following vulnerabilities: CVE-2021-42321 and CVE-2021-42292.

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

November 2021 Release Notes

Security Update Guide

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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