Both fidelity.com and netbenefits.fidelity.com worked for me just now.
More likely than a data breach is some sort of network traffic / DNS issue between your location and Fidelity's servers.
I'd try rebooting / flushing DNS / etc. You might also try:
"At times the world can seem an unfriendly and sinister place, but believe us when we say there is much more good in it than bad. All you have to do is look hard enough, and what might seem to be a series of unfortunate events, may in fact be the first steps of a journey." Violet Baudelaire.