Exchange Security Update – April 2021


Microsoft has released another Exchange Security Update (April 2021). This new update is for Exchange 2013, 2016 and 2019 and fixes some remote execution vulnerabilities.

Microsoft recommends updating all your Exchange Server, that is affected by these vulnerabilities, which is:

  • Exchange 2013
  • Exchange 2016
  • Exchange 2019

The Security Update is only available for the latest Cumulative Update level (CU), so if you have not updated the these, then you will need to update CU first. See the original blog post for more info and this, as will use the new Exchange Update Wizard:

Reference – the original blog post: