"When people are talking about cyber weapons, digital weapons, what they really mean is a malicious program that's used for a military purpose. A cyber weapon could be something as simple as an old virus from 1995 that just happens to still be effective if you use it for that purpose."

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You can show a guy sort of peeking over the wall, you can see a guy tunneling underneath, you can see a guy going through the front door. All of those, in cyber terms, are vulnerabilities, because it's not that you have to look for one hole of a specific type. It's the whole paradigm.

— Edward Snowden