exchange server 2019

CVE-2026-55009 affects Microsoft Exchange Server 2016 CU23, Exchange Server 2019 CU14 and CU15, and Exchange Server Subscription Edition RTM, allowing an authenticated attacker to elevate privileges through unsafe deserialization. Microsoft addressed the flaw in security updates released on July...

Microsoft is preparing a second round of paid breathing room for organizations still running Exchange Server 2016 and Exchange Server 2019, but the message behind the new Period 2 ESU program is unmistakable: the company wants customers off these older builds as quickly as possible. The updated...