CVE-2026-48583 is a use-after-free vulnerability (CWE-416) in the Windows Kernel component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). This flaw enables a local attacker with authorized access to escalate privileges on the affected system. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue, as documented in their security update guide.

Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access to the system. This can compromise system confidentiality, integrity, and availability. There are no known exploits in the wild at the time of publication.

An official fix is available from Microsoft. It is recommended to apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48583. Applying this patch will remediate the vulnerability.