Because this leak contained information they weren’t already aware of...
I need to find that article about the 4000+ security risks who work for NSA.
Here we go:
All this leak does is let the REST of us know that encryption is teetering on the edge of nonusefulness.
Commercial encryption is already non-useful with regards to national level eavesdropping.
It’s not the specific communications that are necessarily vulnerable, it’s the exploits sold by international corporations to anyone who is willing to pay. The exploits allow access for further information gathering (such as key logger software).
Do you have a new printer? Do you have a new mouse? Do you have the most recent update of Acrobat? Exploits of drivers and productivity software is major business these days.
Guess who pays megabucks for these exploits? Every major intelligence organization.
However, criminal enterprises worry me most; and now my perception is that many overseas criminal enterprises work hand in hand with state sponsored cyber eavesdropping organizations.
Sorry to wax long winded. Just my reason for keeping as minimal an internet presence as possible.