CVE-2026-69284: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607

This vulnerability, tracked as CVE-2026-69284, involves a heap-based buffer overflow in the Windows DCOM Server. It affects various Windows 10 versions starting from build 10.0.14393.0 up to but excluding specific patched builds (e.g., <10.0.14393.9512, <10.0.17763.9245, etc.). An authorized local attacker can exploit this flaw to elevate privileges on the affected system. The vulnerability is rated high severity with a CVSS 3.1 base score of 7.8, reflecting local attack vector, low attack complexity, required privileges, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability.

An authorized local attacker can exploit this heap-based buffer overflow in the Windows DCOM Server to elevate privileges, potentially gaining higher system rights than intended. This could lead to full system compromise depending on the privileges gained. The vulnerability impacts confidentiality, integrity, and availability of the affected systems.

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 listed in the vendor advisory. No additional mitigation steps are indicated beyond applying the official patch.