Starting in October 2016 — Microsoft will be changing WIN7 and WIN8 monthly security updates to use a more “WIN10-like” approach where all changes are rolled up into a single update

https://blogs.technet.microsoft.com/windowsitpro/2016/08/15/further-simplifying-servicing-model-for-windows-7-and-windows-8-1/

Security-only updates — Also from October 2016 onwards, Windows will release a single Security-only update. This update collects all of the security patches for that month into a single update. Unlike the Monthly Rollup, the Security-only update will only include new security patches that are released for that month. Individual patches will no longer be available. The Security-only update will be available to download and deploy from WSUS, SCCM, and the Microsoft Update Catalog. Windows Update will publish only the Monthly Rollup – the Security-only update will not be published to Windows Update. The security-only update will allow enterprises to download as small of an update as possible while still maintaining more secure devices.