CVE-2026-69513: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809

This vulnerability (CVE-2026-69513) involves a heap-based buffer overflow in the Windows Error Reporting component of Microsoft Windows 10 Version 1809 and several subsequent builds. An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow). The CVSS v3.1 base score is 7.8, indicating high severity, with attack vector local, low attack complexity, and no user interaction required. Microsoft has published an official fix for this vulnerability, and detailed remediation guidance is available in the Microsoft Security Response Center advisory.

Successful exploitation of this vulnerability allows an authorized local attacker to elevate privileges, potentially gaining higher-level access on the affected Windows 10 systems. This could lead to full system compromise depending on the privileges obtained. The vulnerability affects confidentiality, integrity, and availability, all rated high impact in the CVSS vector.

An official fix is available from Microsoft. It is recommended to apply the security updates provided by Microsoft for the affected Windows 10 versions as soon as possible to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69513 for detailed patching instructions.