The zero-day threat is a serious one for any vendor or organisation to deal with and you should understand how it can defeat your technical defences. Here is a three-part mini-series that takes you through the zero-day threat in a straightforward way so you can make some decisions on how you are going to combat it.
Zero-day and what you can do about it
The Zero-day Threat – What is it?
The Zero-day Threat – What can you do about it?
The Zero-day Problem – Do Something Special
Clive Catton MSc (Cyber Security) – by-line and other articles