The new patch has the support number of KB3116900. At the moment, there's no word on what's contained in the file. Once Microsoft refreshes its Knowledge Base with the details of the update, we'll update this post with more information.
Interestingly, today's update brings the OS up to 10586.29, which now matches the Windows 10 Mobile general and Insider release.
In addition, the Windows Malicious Software Removal Tool has also been updated for all versions of the OS, along with some new definitions for Windows Defender. Finally, the embedded Flash player in Internet Explorer 11 has also received its own security update for Windows 10