Optiv Cybersecurity Dictionary

What Is Zero-Day?

Zero-day refers to a vulnerability in a system or software that was not previously known until after it was successfully hacked (either by a nefarious or ethical hacker). The term originated from the notion that the security community had zero days of knowledge about the vulnerability before it was exploited.

 

This contrasts to other vulnerabilities where the security community is aware of the issue and has responded by making a patch available. Zero-day exploits are far less common than exploits of known vulnerabilities, but can be especially damaging.


Contact Us

 

Would you like to speak to an advisor?

How can we help you today?

Image
field-guide-cloud-list-image@2x.jpg
Cybersecurity Field Guide #13: A Practical Approach to Securing Your Cloud Transformation
Image
OptivCon
Register for an Upcoming OptivCon

Ready to speak to an Optiv expert to discuss your security needs?