Microsoft has released security patches to address multiple vulnerabilities in their software and products.
The vulnerabilities that have been classified as Critical in severity are listed in the table below.
For the full list of security patches released by Microsoft, please refer to https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2021-Oct
Separately, Microsoft has fixed CVE-2021-40449, an escalation of privilege vulnerability in Win32k that was actively exploited in the wild. Users and administrators are advised to apply the necessary patches immediately. For more information, please refer to https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449