KB4520003 Security Only Quality update for Windows 7 - Oct. 8

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October 8, 2019 - KB4520003 (Security-only update)

Applies to: Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1


IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update.

IMPORTANT Customers who have purchased the Extended Security Update (ESU) for on-premises versions of some operating systems must follow specific procedures to continue receiving security updates after extended support ends on January 14, 2020. For more information, see KB4522133.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• 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.
• Security updates to Windows Authentication, Microsoft JET Database Engine, Windows Kernel, Internet Information Services, and Windows Server.

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

Before installing this update

Prerequisite:

You must install the updates listed below and restart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup.

• The March 12, 2019 servicing stack update (SSU) (KB4490628). If you are using Windows Update, this SSU will be offered to you automatically. To get the standalone package for this SSU, search for it in the Microsoft Update Catalog.
• The latest SHA-2 update (KB4474419) released October 8, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
• The latest SSU (KB4516655). If you are using Windows Update, the latest SSU will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

Install this update



File information

For a list of the files that are provided in this update, download the file information for update 4520003.

Source: https://support.microsoft.com/en-us/help/4520003


Direct download links for KB4520003 MSU file from Microsoft Update Catalog:

:ar: Download KB4520003 MSU for Windows 7 32-bit (x86) - 22.2 MB

:ar: Download KB4520003 MSU for Windows 7 64-bit (x64) - 35.4 MB