Description of the security update for Microsoft Exchange Server Subscription Edition RTM: October 14, 2025 (KB5066366)

Description of the security update for Microsoft Exchange Server Subscription Edition RTM: October 14, 2025 KB5066366 Original article content This security update rollup resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common...

VulnCheck KEV: CVE-2021-42321

An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution...