What is considered an unacceptable risk?

An unacceptable risk is defined as a risk that could significantly impact the organization’s objectives. In the context of ISO 27001, organizations must assess and evaluate risks to their information security. When a risk poses a substantial threat that could hinder the achievement of the organization's goals, it requires immediate attention and management.

This definition aligns with the principle that organizations must ensure their information security management systems protect their core objectives, which can include confidentiality, integrity, and availability of information. By identifying risks that can significantly affect these objectives, organizations can prioritize their risk treatment strategies effectively.

The other options present scenarios that do not align with the definition of unacceptable risk. A risk that presents no threat does not require mitigation since it does not pose a concern. Similarly, a risk that has been completely eliminated is no longer a risk and thus is not relevant when considering acceptable versus unacceptable risks. Finally, sharing a risk with other organizations can often reduce the impact on any single entity, potentially rendering it more acceptable, depending on the context and agreement between the parties involved.