The discovery of a zero-day vulnerability in WhatsApp, one of the world’s most widely used messaging apps, is nothing short of frightening. This vulnerability allowed an adversary, who is yet to be identified (but I’d bet my left kidney that it’s some flavor of nefarious state actor), to install sophisticated spyware in a targeted way. I don’t know how else I can say this: this is really bloody bad. But the thing is, it could have been much worse. WhatsApp was able to quickly issue a fix to all users. Furthermore, the Facebook-owned company has a long-standing policy of only…

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