"Update, May 30 at 8:27 a.m.: According to the FBI's PSA regarding VPNFilter, the reboot recommendation is not intended to remove the malware, but rather to "temporarily disrupt [it] and aid the potential identification of infected devices." In other words, the FBI is enlisting you in a search-and-destroy operation. Needless to say, we recommend the aforementioned firmware update and factory reset if you own one of the affected router models."
This makes this a far more onerous task. About half the home users I know of will be able to update the router firmware. At least the affect models (the ones we know about) is on a short list. Read the article for the list of routers you really need to take care of.