SYO-401 Exam Question No 21

Question No 21:

 A security analyst, Ann, is reviewing an IRC channel and notices that a malicious exploit has been created
for a frequently used application. She notifies the software vendor and asks them for remediation steps, but
is alarmed to find that no patches are available to mitigate this vulnerability.
Which of the following BEST describes this exploit?

A. Malicious insider threat
B. Zero-day
C. Client-side attack
D. Malicious add-on

Answer: B