KB4520004 improves password and browser security


Vlad Turiceanu
by Vlad Turiceanu
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download KB4520004

It’s Patch Tuesday time, once again. This time, with the October updates, Microsoft has released a new set of cumulative updates for all the Windows 10 versions.

October 2019 Patch Tuesday updates bring security improvements

Windows 10 v1709 has also received some much needed improvements.

Namely, KB4520004 comes with some security changes regarding the usage of passwords, storing files, and improved security when using Internet Explorer and Microsoft Edge.

Along with the security changes, there are also lots of fixes.

Check out the full list of quality improvements and changes:

  • Addresses an issue in the Keyboard Lockdown Subsystem that may not filter key input correctly.
  • Addresses an issue with the Bluetooth hardening updates, released August 13, 2019, that may cause a “0x133 DPC_WATCHDOG_VIOLATION” error.
  • Addresses an issue in security bulletin CVE-2019-1318 that may cause client or server computers that don’t support Extended Master Secret (EMS) RFC 7627 to have increased connection latency and CPU utilization. This issue occurs while performing full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. EMS support has been available for all the supported versions of Windows since calendar year 2015 and is being incrementally enforced by the installation of the October 8, 2019 and later monthly updates.
  • Addresses an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Security updates to Windows Shell, Microsoft Edge, Internet Explorer, Windows App Platform and Frameworks, Windows Cryptography, Windows Authentication, Windows Datacenter Networking, Windows Storage and Filesystems, Microsoft JET Database Engine, Windows Kernel, Microsoft Scripting Engine, and Windows Server.

It’s worth noting that if you already downloaded and installed earlier updates, only the new fixes included in this package will be downloaded on your PC.

Don’t forget to share your experience with the new updates in the comments section below.