Windows 10 2016 build 14393.8519 (KB5066836) — release notes, known issues

Windows 10 · 2016 · Release · Security update (Patch Tuesday)

October 14, 2025—KB5066836 (OS Build 14393.8519)

All 2016 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 14393.8519 or KB5066836 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 Windows 10 1511 Security Update KB3124263: Build 10586.63 (Jan 2016) Nov 17, 2025 · Windows 10 2016 coverage from this build's release window
Coverage Exchange Server 2016/2019 End of Support: Migrate to SE or Online Now Oct 14, 2025 · Windows 10 2016 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 10 2016 coverage from this build's release window
Fix CVE-2016-9535: LibTIFF Predictor Heap Overflow Patch and Remediation Oct 14, 2025 · Windows 10 2016 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 10 2016 coverage from this build's release window
Coverage Windows 10 End of Support 2025 and Server 2016 2027: Migration and ESU Oct 15, 2025 · Windows 10 2016 coverage from this build's release window
Coverage Samsung Galaxy TabPro S at CES 2016: AMOLED Windows 2-in-1 Oct 19, 2025 · Windows 10 2016 coverage from this build's release window

Thread Windows Server Essentials 2016 retrieve event log details 3 replies · Oct 26, 2025 · 2016 thread from the release window