CVE-2026-73010: CWE-416: Use After Free in Microsoft Windows 10 Version 1809

CVE-2026-73010 is a use-after-free vulnerability (CWE-416) in the Windows Failover Cluster feature of Microsoft Windows 10 Version 1809. An attacker can exploit this flaw remotely over a network to execute arbitrary code without requiring privileges or user interaction. The vulnerability affects Windows 10 Version 1809 builds from 10.0.17763.0 up to but not including 10.0.17763.9245, builds from 10.0.20348.0 up to but not including 10.0.20348.5622, and builds from 10.0.26100.0 up to but not including 10.0.26100.33438. Microsoft has published an official security update to remediate this issue.

Successful exploitation of this vulnerability allows an unauthenticated attacker to execute arbitrary code remotely on affected Windows 10 Version 1809 systems. This can lead to full compromise of the affected system, impacting confidentiality, integrity, and availability. There are no known exploits in the wild at this time.

An official fix is available from Microsoft. Administrators should apply the security updates provided by Microsoft for Windows 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73010 for detailed patch information and guidance.