Microsoft releases Windows 10 KB5099539 extended security update
ID: b351ba0a-0206-503c-baa6-9c12795ff57c
STIX ID: report--b351ba0a-0206-503c-baa6-9c12795ff57c
Feed Name: Bleeping Computer
Microsoft released Windows 10 KB5099539 (builds 19045.7548 / 19044.7548) which bundles the July 2026 Patch Tuesday security updates addressing 570 vulnerabilities — including two exploited and one publicly disclosed zero-day — along with various bug fixes and known-issue notes (OLE Automation, File Explorer, Recycle Bin, input hotkeys). The advisory also describes changes affecting Secure Boot certificate deployment, TDI transport registration hardening that may break legacy third-party transports, RDP SHA-2 thumbprint support guidance, and instructions for devices on ESU/LTSC to obtain the update via Windows Update.
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