Microsoft released the September 2019 Microsoft Office security updates, bundling a total of 19 security updates and five cumulative updates across seven different products. Five of the updates patching remote code execution flaws in Office 2016, Office 2013, Office 2010, Excel 2016, SharePoint Server 2019, and SharePoint Enterprise Server 2016. The rest of the security patches also fix information disclosure, security feature bypass, elevation of privilege, and spoofing vulnerabilities impacting several other Microsoft Office products. The security updates are available via the Microsoft Update platform and the Download Center.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-the-september-2019-security-updates-for-office/