Which type of attack poses the GREATEST risk to an organization's most sensitive data?

Spear phishing attacks are a common vector for initial compromise, but they are typically used to gain access for subsequent actions, not the direct method of data compromise by an already trusted entity.

Insider attacks are considered the greatest risk to sensitive data because insiders often have legitimate access to critical systems and data, allowing them to bypass many perimeter defenses. Their familiarity with internal controls and data locations, combined with existing trust, makes it easier for them to exfiltrate or compromise sensitive information without immediate detection compared to external attackers.

Password attacks aim to gain unauthorized access, but once successful, the attacker may still face other internal controls and typically lacks the inherent trust and system knowledge of an insider.

Eavesdropping attacks involve intercepting data in transit, which can compromise data, but they generally do not provide the broad internal system access and understanding that a malicious insider possesses.