Windows Server 2019 build 17763.7919 (KB5066586) — release notes, known issues

Windows Server · 2019 · Release · Security update (Patch Tuesday)

October 14, 2025—KB5066586 (OS Build 17763.7919)

Windows Server 2019: Extended support

All 2019 builds JSON — this build from the builds API

Known issues — reported on the forum

No problems reported on the forum for this build yet. Threads that name 17763.7919 or KB5066586 and describe a fault appear here automatically.

Fix BitLocker 2025 CVEs: Patch Boot Path Attacks with TPM PIN Oct 16, 2025 · names this build
Coverage Exchange Server 2016/2019 End of Support: Migrate to SE or Online Now Oct 14, 2025 · Windows Server 2019 coverage from this build's release window
Coverage October 2025 Exchange Server Security Updates: End of Public 2016/2019 SUs & Hybrid App Enforcement Oct 14, 2025 · Windows Server 2019 coverage from this build's release window
Coverage Office 2016 2019 End of Support: Move to Microsoft 365 or LTSC 2024 Oct 15, 2025 · Windows Server 2019 coverage from this build's release window
Coverage Office 2016 and 2019 End of Support 2025: Migration Paths and ESU Gap Explained Oct 20, 2025 · Windows Server 2019 coverage from this build's release window
Fix Patch Rockwell FactoryTalk Policy Manager for CVE-2024-22019 DoS vulnerability Nov 13, 2025 · Windows Server 2019 coverage from this build's release window