CVE-2021-26857 | Microsoft Exchange Server 2013 CU23/2016 CU18/2016 CU19/2019 CU7/2019 CU8 deserialization
A vulnerability was found in Microsoft Exchange Server 2013 CU23/2016 CU18/2016 CU19/2019 CU7/2019 CU8. It has been declared as critical. Affected by this vulnerability is an unknown functionality. The manipulation leads to deserialization.
This vulnerability is known as CVE-2021-26857. The attack can be launched remotely. Furthermore, there is an exploit available.
It is recommended to apply a patch to fix this issue.