0-day

0-day

Used to describe a software security vulnerability that has just been exploited or discovered, often before the software developers can formally announce or create a fix (thus giving them "zero days" to preemptively address the issue). It was a 0-day attack—the developers had no idea that their program could be hacked in that way. Please tell me that our software is well-protected against zero-day exploits. Because it was a 0-day attack, it's going to take time for us to get the site back up and running again.

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