CVE-2026-68850: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 Version 24H2

This vulnerability (CVE-2026-68850) is a heap-based buffer overflow in the Microsoft Account component of Windows 11 Version 24H2. It enables an attacker with local authorized access to elevate their privileges on the affected system. The vulnerability affects specific builds of Windows 11 Version 24H2, and Microsoft has released an official fix to address this issue. The CVSS 3.1 vector indicates the attack requires local access with low complexity and privileges, no user interaction, and results in high impact on confidentiality, integrity, and availability.

An authorized local attacker can exploit this heap-based buffer overflow to elevate privileges, potentially gaining higher system rights than intended. This could lead to full system compromise depending on the privileges gained.

An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for Windows 11 Version 24H2 as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68850.