Product group released February 2017 Cumulative Update and it is available for download
- KB 3141515 — SharePoint Server 2016 language independent (build number 16.0.4498.1002)
- KB 3141517 — SharePoint Server 2016 language dependent fixes (build number 16.0.4498.1002)
Direct link to download updates
- Download Update for SharePoint Server 2016 February 2017 (language independent)
- Download SharePoint Server 2016 February 2017 (language dependent fixes)
Please run SharePoint Configuration Wizard aka PSConfig on every server in the farm.
You could use this PowerShell script in order to determine your SharePoint farm patch level.
Note: Install cumulative updates into test environment first and just in order to keep your production first. If update deployment was okay, then continue with production environment. In any case, it will be nice to have backups.