It looks like Samsung is pushing out a critical update to the Galaxy S5 that the company says is an "emergency update" related to the S Finder universal search app on the phone. The update could be downloaded over WiFi or over your carrier's network, though the latter will incur "additional data charges according to your data plan."
At this time, it's not known what is being patched, but the company says that "S Finder needs emergency updates for security and fundamental error correction," asking the user "will you update?"
We've seen the update hit our Galaxy S5 phones here at Android Central. Are you getting a push notification prompting you to update? Did the update process run smoothly for you? Let us know in the comments!