January 13, 2026—KB5073450 (OS Build 25398.2092)

January 13, 2026—KB5073450 OS Build 25398.2092 This cumulative update for Windows Server, version 23H2 KB5073450, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security...

January 13, 2026—KB5073457 (OS Build 20348.4648)

January 13, 2026—KB5073457 OS Build 20348.4648 This cumulative update for Windows Server 2022 KB5073457, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates,...

January 13, 2026—KB5073699 (Security-only update)

January 13, 2026—KB5073699 Security-only update Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...