What is the type of result an analyst seeks when reviewing for a missed legitimate issue by a scanning tool?

When analyzing results from a scanning tool, a false negative occurs when the tool fails to identify an existing issue, leading the analyst to believe that no vulnerability or threat exists when it actually does. This is particularly problematic because it can give a false sense of security, potentially allowing a significant risk to remain unaddressed.

In the context of the question, when an analyst is looking for a missed legitimate issue, they are effectively trying to uncover warnings or alerts that should have been triggered but were not. Finding a false negative highlights the tool's inadequacy in detecting genuine problems, prompting the analyst to investigate further or adjust the scanning tool's configurations to enhance its effectiveness. Hence, recognizing a false negative directly relates to ensuring that the scanning tool is comprehensive and accurate in identifying real threats.