A party, including an insider, who acts with malicious intent to compromise a system.
Source(s):
NIST SP 800-63-3
under Attacker
person seeking to exploit potential vulnerabilities of a system
Source(s):
NISTIR 8053
A party who acts with malicious intent to compromise an information system.
Source(s):
NIST SP 800-63-2
[Superseded]
under Attacker