What does the sum of the risks presented by an application represent for that application?

The attack surface of an application is the aggregate of all the different points where an unauthorized user could attempt to enter, extract data from, or exploit the system. It encompasses every reachable and exploitable pathway or vulnerability across the entire application. Reducing the attack surface is a core security principle because a smaller surface means fewer opportunities for attackers.

A security violation refers to a specific act or event that breaches a security policy, not the cumulative risk profile of an application.

A vulnerability is a single specific weakness in a system, not the sum of all risks presented across an entire application.

A HIPAA violation (misspelled in the question as 'HIPPA') refers to a breach of healthcare data privacy regulations and is unrelated to measuring the total risk an application presents.