List of SharePoint Security Updates

TechNet has a great resource located on their Microsoft Security Bulletins page to list all of the security updates for all products, including SharePoint Server. To see the list of updates, go here, then under Search by Product or Component, select the appropriate version of SharePoint, then click the Search by Product or Component button. It will list all applicable security updates below.

SPSecurityBulletins

And of course, standard SharePoint updates can be found in the TechNet SharePoint Update Center for SharePoint 2010 and SharePoint 2013.

Trevor Seward is a Microsoft Office Apps and Services MVP who specializes in SharePoint Server administration, hybrid scenarios, and SharePoint Online. He has been working with SharePoint for 16 years from SharePoint 2003 on up, managing environments with terabytes of content for 150,000+ user organizations. Trevor is an author of Deploying SharePoint 2016 and Deploying SharePoint 2019. You can find him at /r/sharepoint.