Here's the full notice -> https://arstechnica.com/information-technology/2018/05/fbi-tells-router-users-to-reboot-now-to-kill-malware-infecting-500k-devices/

You can read what happened if you wish but just a r̴e̴b̴o̴o̴t̴ ̴a̴n̴d̴ ̴i̴t̴'̴s̴ ̴g̴a̴m̴e̴ ̴o̴v̴e̴r̴ ̴f̴o̴r̴ ̴t̴h̴i̴s̴ ̴m̴a̴l̴w̴a̴r̴e̴.̴

Update in new reply.

Turns out nothing is as simple as this. Updated information follows.

https://www.cnet.com/how-to/the-fbi-says-you-should-reboot-your-router-should-you/#

"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."

Here's the current list of possibly affected models:
"Linksys: E1200, E2500, WRVS4400N
Mikrotik: 1016, 1036, 1072
Netgear: DGN2200, R6400, R7000, R8000, WNR1000, WNR2000
QNAP: TS251, S439 Pro, other QNAP NAS devices running QTS software
TP-Link: R600VPN"

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.