This vulnerability is caused by incorrect conversion between numeric types (integer size truncation) in the Windows Advanced Rasterization Platform component of Windows 10 Version 1607 (build 10.0.14393.0). Exploiting this flaw enables a local attacker without privileges to elevate their privileges on the system. The vulnerability is tracked as CVE-2026-26178 and is classified under CWE-681 (Incorrect Conversion between Numeric Types). Microsoft has published an official fix to remediate this issue.

Successful exploitation of this vulnerability allows an unauthorized local attacker to gain elevated privileges, potentially leading to full system compromise. The CVSS vector indicates network attack vector is not required (local attack), low attack complexity, no privileges required initially, but user interaction is needed. The impact on confidentiality, integrity, and availability is high.

An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26178. Applying this patch will remediate the vulnerability and prevent exploitation.