A security engineer is reviewing a record of events after a recent data breach incident that Involved the following:
* A hacker conducted reconnaissance and developed a footprint of the company s Internet-facing web application assets.
* A vulnerability in a third-party horary was exploited by the hacker, resulting in the compromise of a local account.
* The hacker took advantage of the account's excessive privileges to access a data store and exfilltrate the data without detection.
Which of the following is the BEST solution to help prevent this type of attack from being successful in the future?