article_13017623221779.json

{"title": "Expel alert categorization by alert fidelity and impact", "url": "https://support.expel.io/hc/en-us/articles/13017623221779-Expel-alert-categorization-by-alert-fidelity-and-impact", "date": "2023-01-13T17:15:27Z", "contents": "Expel uses the following matrix to map an alert's fidelity and impact to an\nExpel alert severity.\n\n![Matrix_Alert_Fidelity.png](https://support.expel.io/hc/article_attachments/13017669036307/uuid-086f9131-d1fa-3466-5f93-00eedafdce66.png)\n\nExpel considers the following when assigning severities of Critical, High,\nMedium, or Low for Expel created rule content, and when reclassifying certain\nsecurity product alerts:\n\n  1. How likely can the underlying logic that generated the alert identify what it was designed to identify? This is also known as the _alert fidelity_.\n\n    * High Fidelity: the alert maintains a true positive rate of **50%** or greater.\n\n    * Medium Fidelity: the alert maintains a true positive rate between **5% to 50%**.\n\n    * Low Fidelity: the alert maintains a true positive rate between **0% to 5%**.\n\n  2. If the alerts are a true positive, what is the impact to the organization?\n\n    * High Impact: there's a high or absolute likelihood of consequences, including but not limited to:\n\n      * Business operation outage to critical systems\n\n      * Large reputational damage\n\n      * Large amount of regulated data exposed\n\n      * Catastrophic exposure of trade secrets\n\n      * Large financial loss\n\n    * Medium Impact: there's a high or absolute likelihood of consequences, including but not limited to:\n\n      * Business operation outage to non-critical systems\n\n      * Limited reputational damage\n\n      * Limited amount of regulated data exposed\n\n      * Limited exposure of trade secrets\n\n      * Limited financial loss\n\n    * Low Impact\n\n      * No business operation outage\n\n      * No reputational damage\n\n      * No amount of regulated data exposed\n\n      * No exposure of trade secrets\n\n      * No financial loss\n\n"}