NOAA is reporting R3 activity. Solar flare outage seems likely
Could be a hack Could be a single point of failure Could be a config change that borked the system
Could be other things that make more sense we will have to wait for more info.
We did have Two Class X flares from sunspot 3590 but they did not result in a coronal mass ejection.
There was a CME from another sunspot not visible but it is not aimed at the earth.
https://www.swpc.noaa.gov/news/two-major-solar-flares-effect...
[1] - https://www.thousandeyes.com/outages/
Edit: I’m getting 1 bar when I usually get 4 in southern Ontario. But I see no broad reports of issues.