KQL Search

This query is designed to identify and summarize information about software vulnerabilities on devices within a network. Here's a breakdown of what it does:

1. Identify Vulnerable Devices: It starts by listing all devices that are vulnerable to each specific CVE (Common Vulnerabilities and Exposures) ID. This is done by creating a set of device names for each CVE.

2. Join with Additional Information: It then joins this list with another dataset that contains more detailed information about each CVE, such as its severity level and description.

3. Filter for Critical Vulnerabilities: The query filters the results to only include vulnerabilities that have a CVSS (Common Vulnerability Scoring System) score greater than 7, indicating they are high-severity, and where an exploit is available, meaning there is a known method to take advantage of the vulnerability.

4. Calculate Total Affected Devices: For each vulnerability, it calculates the total number of devices affected.

5. Select Relevant Information: Finally, it projects (selects) the relevant columns to display: the total number of vulnerable devices, the CVE ID, the severity level of the vulnerability, the CVSS score, a description of the vulnerability, and the list of vulnerable devices.

In simple terms, this query helps identify and provide details on high-severity vulnerabilities that have known exploits and affect multiple devices in a network.