Maybe so, but "certain", from a grammatical standpoint, implies that they know exactly which models are affected, which in turn implies that it is not the entirety of their printers that are affected. Maybe that's not the case, and every single printer they make is affected, but that's just my thought on it ¯\_(ツ)_/¯

I don't know, by reading "certain HP Inkjet printers" I imagined that it would imply a small number of "known" affected models (all belonging to the Inkjet family, of course).

It seems to me that the given list could be better summed up with something like:

"All HP Inkjet printers manufactured in the last n years, with the exception of models A, B and C"."

>entirety of their printers that are affected

Some were too old for this vulnerability?

To be fair, that list doesn't seem to include any of their LaserJet range, which I've always thought was their "business class" printers...

Laserjets wouldn't be in the set of "certain HP Inkjet printers" because they are Laserjets, not Inkjets. :P