CVE-2026-69875: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809

This vulnerability involves a heap-based buffer overflow in the Windows NTFS driver, which could be exploited by an authorized attacker remotely to elevate privileges on affected Windows 10 systems. The flaw affects multiple builds of Windows 10 starting from version 1809 through various later builds prior to their respective fixed versions. Microsoft has published an official security update to address this issue.

Successful exploitation of this vulnerability could allow an attacker with authorized network access to elevate their privileges, potentially gaining higher-level permissions on the affected system. This could lead to full system compromise, including the ability to execute arbitrary code with elevated privileges, impacting confidentiality, integrity, and availability.

An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69875. No additional mitigation steps are specified beyond applying the official patch.