This article is wrong. It states: "MicroTik Cloud Core routers, mainly used by enterprises, may be affected if they run versions 1016, 1036 or 1072 of the MicroTik RouterOS.
Rebooting is enough to get rid of stages 2 and 3, if present. To get rid of stage 1, you have to factory reset, and preferably overwrite the firmware too, even if it's already up-to-date.
More helpful than TFA or the FBI's announcements was this blog post, already featured on HN at least once and linked by commenters probably multiple times:
Those are model numbers, not firmware versions. He lifted that from this Krebs artical (https://krebsonsecurity.com/2018/05/fbi-kindly-reboot-your-r...) which is also wrong.
All Mikrotik products running less than version 6.38.5 are vulnerable: https://forum.mikrotik.com/viewtopic.php?t=134776
It makes me wonder what else is wrong....