What is 0-day?

0-day, pronounced "Zero Day" or sometimes "Oh Day", means "new."

The term has it's origins in the warez scene, but has become firmly entrenched in the exploit trading scene.

If a game or an exploit was release on yesterday, it is 1-day. If it was released a full week ago, it is 7-day.

0-day is used to refer to exploits released today and exploits that have not yet been released.

An exploit might be 0-day to you because it was just publicly released, but two-months old to members of the group that coded the exploit.

Bookmark What is 0-day?