CVE-2024-24790 and is rated Critical severity with a CVSS score of 9.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Sep 17, 2026
Vendor remediation details
CBL-Mariner Releases
Vendor-listed releases
1.18.8-4
1.21.11-1
1.22.3-1
1.21.6-1
CISA KEVNot listedBased on the latest collected catalog
EPSS2.0%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2024-24790?
The various Is methods (IsPrivate, IsLoopback, etc) did not work as expected for IPv4-mapped IPv6 addresses, returning false for addresses which would return true in their traditional IPv4 forms.