Microsoft has published the December 2019 security updates

December security release consists of security updates for the following software:

Microsoft Windows
Internet Explorer
Microsoft Office and Microsoft Office Services and Web Apps
SQL Server
Visual Studio
Skype for Business

Please note the following information regarding the security updates:

For information regarding enabling Windows 10, version 1909 features, please see Windows 10, version 1909 delivery options. Note that Windows 10, versions 1903 and 1909 share a common core operating system with an identical set of system files. They will also share the same security update KBs.
Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the Microsoft Update Catalog.
For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.
A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
Starting in May 2019, Internet Explorer 11 is available on Windows Server 2012. This configuration is present only in the IE Cumulative package.
Updates for Windows RT 8.1 and Microsoft Office RT software are only available via Windows Update.
In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.

The following CVEs have FAQs with additional information and may include * further steps to take after installing the updates. Please note that this is not a complete list of CVEs for this release.

ADV990001
ADV190026 *
CVE-2019-1349 *
CVE-2019-1350 *
CVE-2019-1351 *
CVE-2019-1352 *
CVE-2019-1354 *
CVE-2019-1355 *
CVE-2019-1387 *
CVE-2019-1400
CVE-2019-1461
CVE-2019-1462
CVE-2019-1463
CVE-2019-1464
CVE-2019-1465
CVE-2019-1466
CVE-2019-1467
CVE-2019-1469
CVE-2019-1470
CVE-2019-1472
CVE-2019-1474
CVE-2019-1480
CVE-2019-1481
CVE-2019-1486 *
CVE-2019-1487
CVE-2019-1489

Known Issues

The following KBs contain information about known issues with the security updates. For more information about Windows Known Issues, please see Windows message center. Links to currently-supported versions of Windows 10 are in the left pane.

For a complete list of security update KBs, please see 20191210.

December 2019 Security Updates