A zero-day vulnerability refers to a security flaw in software or hardware that is exploited by attackers before the vendor releases a patch or becomes aware of the issue. These vulnerabilities are called "zero-day" because organizations have zero days to prepare or defend against attacks using them.
To defend against zero-day vulnerabilities, organizations can:
Employ intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor and block suspicious activities.
Implement network segmentation to limit the impact of a breach.
Stay up-to-date with security advisories and patches from vendors.
Utilize threat intelligence feeds to detect and respond to emerging threats.
A proactive approach to security and rapid response to vulnerabilities are essential in mitigating zero-day threats.