A high-risk vulnerability in an application is a system flaw or weakness in the application’s code that can be exploited by a malicious actor, potentially leading to a security breach. The risk associated with a high-risk vulnerability in an application is the possibility and impact of such a breach occurring. The risk owner of a high-risk vulnerability in an application is the person or entity who has the authority and responsibility for managing the risk. The risk owner should be able to define the risk appetite, assess the risk level, select and implement the risk response, monitor and report the risk status, and ensure the risk alignment with the business objectives and strategy. The risk owner of a high-risk vulnerability in an application is the business unit, which is the organizational unit that operates the application and derives value from it. The businessunit understands the business needs and expectations of the application, and the potential consequences of a security breach. The business unit also has the resources and incentives to address the risk effectively and efficiently. Therefore, the business unit is the most appropriate risk owner of a high-risk vulnerability in an application. References = Why Assigning a Risk Owner is Important and How to Do It Right, CRISC 351-400 topic3, Foundations of Project Management : Week 2.