[tristanj]

It's not a zero-day exploit.

[VikingCoder]

There's no way of knowing if this was exploited in the wild before it was discovered and mitigated. If it was, then it was a zero-day exploit.

[tristanj]

By this logic, all exploits for publicly released software, patched or unpatched, could be zero-day exploits. That would make the term rather meaningless, IMHO.