Microsoft is pushing out a new cumulative update to Windows 10 this evening. It's unclear what the update addresses, but this one clocks in with support label number KB3081438.
There don't appear to be any other security updates coming along with this one, but we'd suggest checking Windows Update to grab it when you can. This follows another cumulative update that was released earlier this week that brought a fix for issues signing into the Windows Store, along with security updates for Microsoft's Silverlight and Adobe's Flash player.
Update: Microsoft has now published the details behind KB3081438, which can be found here. No specifics are given but you can see the updated files.
Thanks to Vijay for the tip!