The correct answer is 'Authorized Hackers' typically do not seek to exploit vulnerabilities, as their hacking activities are done with permission for testing and improvement purposes. 'Script Kiddies' might exploit known vulnerabilities but often lack the in-depth knowledge to perform systematic scans. A 'Competitor' would have motives to harm the company's business but would not typically be involved in hands-on technical exploitation. Thus, 'Unauthorized Hackers' is the correct answer, as they are individuals who access computer systems without permission, exploiting known vulnerabilities with the intent to cause harm or steal data.