changelogly / releases / windows-server-2019-17763-8880
WS

Windows Server 2019 KB5094123

KB5094123SecurityBug fixPerformance
πŸ“… June 9, 2026πŸ—‚ Operating SystemsπŸ“¦ Windows Server 2019 β†—πŸ“œ Full changelog β†—
✦ Editor's summary

Windows Server 2019 KB5094123 is the June 2026 cumulative security update. It delivers the latest Microsoft security fixes, improves Secure Boot status reporting, adds additional Secure Boot policy controls, and includes cumulative quality, reliability, and servicing improvements for supported Windows Server 2019 systems.

⚠ Security impact
  • Includes Microsoft's June 2026 cumulative security fixes.
  • Improves Secure Boot security with dynamic status reporting in the Windows Security app.
  • Adds the LimitSecureBootRequiredServiceData policy to reduce Secure Boot telemetry sent to Microsoft.
  • Includes additional security hardening for desktop.ini processing (Folder customization).

What's new

  • Updated Windows Server 2019 to OS Build 17763.8880.
  • Installed the June 2026 cumulative security update (KB5094123).
  • Added dynamic Secure Boot status reporting in Windows Security.
  • Introduced the new LimitSecureBootRequiredServiceData policy for Secure Boot.
  • Included cumulative security, quality, and reliability improvements.
  • Added security hardening for desktop.ini processing (Folder customization).
  • Improved overall platform stability and servicing reliability.
  • Continued support lifecycle guidance, with Windows Server 2019 remaining supported until January 9, 2029.

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