On December 8, 2020 Microsoft released a number of security updates for Exchange server. Despite the fact that Exchange 2010 is out of support at all, an important security update for Exchange 2010 was released as well.
| Exchange version | KB Article | Download |
| Exchange 2010 SP3 RU31 | KB4593467 | Download |
| Exchange 2013 CU23 | KB4593466 | Download |
| Exchange 2016 CU17 | KB4593465 | Download |
| Exchange 2016 CU18 | KB4593465 | Download |
| Exchange 2019 CU6 | KB4593465 | Download |
| Exchange 2019 CU7 | KB4593465 | Download |