WatchGuard Fireware v12.0.1 was released on 31 October 2017. This replaces the previous version of 12.0.0. Full release notes can be found. Please read them before upgrading! Your Firebox must be running, XTM v11.7.5, v11.8.4 or v11.9 or higher before upgrading. There is a new Gateway AV Engine in Fireware 12.0 and beyond, so the first time you upgrade to 12.0.x a new signature definition will need to be downloaded which can take 7-10 minutes, future definitions are incremental and much quicker. The software can be downloaded from.