It was fixed in a security patch one month before the Shadow Brokers leak. All computers affected by this ransomware outbreak (and WannaCry) were those who decided not to patch.
I suppose with the word "mitigation" kind of already having a connotation in the security community, I probably shouldn't have used it without making clear that I wanted the term to include its more banal implications such as "install the patch" and/or "get your systems off that old-ass OS!"