Which of the following best describes a zero-day vulnerability?

Which of the following best describes a zero-day vulnerability?
A . A known security flaw with no existing patches
B . A flaw exploited after a patch is released
C . An outdated security protocol
D . A misconfigured firewall setting

View Answer

Answer: A

Explanation:

A zero-day vulnerability refers to a security flaw discovered by attackers before the vendor can issue a patch, leaving systems exposed.