CVE-2026-69906: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607

This vulnerability involves a heap-based buffer overflow in the Windows Secure Kernel Mode component of Microsoft Windows 10 Version 1607 and subsequent updates. An attacker with local authorized access can exploit this flaw to elevate privileges on the affected system. The vulnerability is tracked as CVE-2026-69906 and is classified under CWE-122 (Heap-based Buffer Overflow). The CVSS v3.1 base score is 8.2, indicating high severity, with attack vector local, low attack complexity, high privileges required, no user interaction, and impacts on confidentiality, integrity, and availability. Microsoft has published an official security advisory and provided patches for multiple affected Windows 10 versions.

Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining administrative or SYSTEM-level rights. This can lead to full control over the affected system, compromising confidentiality, integrity, and availability of the system and data.

Microsoft has released official security updates that address this vulnerability. Users and administrators should apply the provided patches for their specific Windows 10 versions as listed in the vendor advisory. No additional mitigation steps are required beyond applying the official fixes.