You don't get points for internet pedantry. Especially when it should be obvious that you're choosing to use a definition of "significant" that doesn't match what I was using in my comment.
virtually,
adverb
[ as submodifier ] nearly; almost: the disease destroyed virtually all the vineyards in Orange County | the college became virtually bankrupt.
The GNU 'echo' program is pretty significant, in the sense it's installed widely, and used widely. What sort of vulnerability exists?