April 2021 Monthly Patch Release

Published on 14 Apr 2021

Updated on 14 Apr 2021

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-Apr

CRITICAL VULNERABILITIES
CVE NumberCVE NameBase ScoreReference
CVE-2021-28481Microsoft Exchange Server Remote Code Execution Vulnerability9.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28481
CVE-2021-28480Microsoft Exchange Server Remote Code Execution Vulnerability9.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28480
CVE-2021-28483Microsoft Exchange Server Remote Code Execution Vulnerability9.0https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28483
CVE-2021-28343Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28343
CVE-2021-28339Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28339
CVE-2021-28338Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28338
CVE-2021-28337Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28337
CVE-2021-28336Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28336
CVE-2021-28335Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28335
CVE-2021-28334Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28334
CVE-2021-28333Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28333
CVE-2021-28332Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28332
CVE-2021-28331Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28331
CVE-2021-28330Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28330
CVE-2021-28329Remote Procedure Call Runtime Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28329
CVE-2021-28482Microsoft Exchange Server Remote Code Execution Vulnerability8.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28482
CVE-2021-28460Azure Sphere Unsigned Code Execution Vulnerability8.1https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28460
CVE-2021-28315Windows Media Video Decoder Remote Code Execution Vulnerability7.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28315
CVE-2021-27095Windows Media Video Decoder Remote Code Execution Vulnerability7.8https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27095