Scenario: A healthcare software vendor is preparing for a security audit. During functional testing, it is discovered that user authentication mechanisms are susceptible to brute force attacks. What should be the immediate action?

Implementing account lockout policies is an immediate action to address the discovered vulnerability. This security measure helps prevent brute force attacks by temporarily locking user accounts after a certain number of failed login attempts. Ignoring the issue could expose the software to security risks, making prompt remediation essential during the security audit preparation phase.