Windows 10 Gets New Security Patch with September Fixes
Microsoft issued the KB5122878 update for Windows 10 Enterprise LTSC and ESU users, bringing build 19045.7725. It includes security fixes from the September 2026 Patch Tuesday, addressing 966 vulnerabilities, and also adjusts Morocco time zone and improves Remote Desktop audio. The update also addresses a BitLocker Group Policy issue.
The KB5122878 patch is specifically tailored for Windows 10 Enterprise LTSC and Extended Security Updates (ESU) subscribers, elevating their systems to build 19045.7725 (or 19044.7725 for LTSC 2021). Installation follows the standard Windows Update path, and Microsoft reports no known issues with this release.
Beyond the massive security sweep addressing 966 flaws, the update includes several targeted operational adjustments. Notably, it prepares systems for Morocco's shift to permanent UTC+00:00, refines Remote Desktop audio playback, and resolves a BitLocker Group Policy glitch that previously forced recovery key entry. It also enhances Secure Boot certificate deployment and improves OMA DM client logging.
This update primarily affects organizations relying on legacy Windows 10 systems through ESU or LTSC, rather than typical home users. The inclusion of fixes for two actively exploited zero-days could significantly reduce immediate cyberattack risks for these enterprises. The operational tweaks, such as the Morocco time zone and Remote Desktop audio, may improve daily workflow stability for global teams. However, the sheer volume of patched vulnerabilities underscores the ongoing security burden for organizations still operating on an end-of-life operating system, potentially influencing future migration decisions.