CVE-2019-0586 | Microsoft Exchange Memory Corruption Vulnerability
Yesterday Microsoft has published an KB article about a security threat to Exchange 2013-2016 and 2019.
The article mentions CU10-CU11 for Exchange 2016, CU21 for Exchange 2013 and RTM version of Exchange 2019 as well.
I spoke to Microsoft of whether this issue affects earlier CU versions for Exchange and they confirmed it
A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the System user. An attacker could then install programs; view, change, or delete data; or create new accounts.
Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Exchange server.
The security update addresses the vulnerability by correcting how Microsoft Exchange handles objects in memory.