Number: AV21-219
Date: 11 May 2021
On 11 May 2021 Microsoft published Security Updates to address vulnerabilities in multiple products. Included were critical updates for the following:
- Windows 10, 8.1, RT 8.1 and 7
- Windows Server and Server Core
- Internet Explorer
Exploitation of some of these vulnerabilities could result in remote code execution.
The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.
May 2021 Release Notes
https://msrc.microsoft.com/update-guide/releaseNote/2021-May
Security Update Guide
https://portal.msrc.microsoft.com/en-us/security-guidance
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.