The CDC's report is not appropriate to make this conclusion. Following through on how the CDC came to this figure they categorize all masks from certain manufacturers whose products have been counterfeited as all being counterfeit. If company X makes legitimate N95 masks, but there is a company Y that makes counterfeit X masks, then all of X's masks are considered counterfeit.

That's fine if you want to play it safe, but it's not fine if you're making a judgement about genuine capacity or supply.