This vulnerability (CVE-2026-83971) involves a heap-based buffer overflow in the Windows Biometric Service component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw enables an attacker with local authorized access to escalate privileges on the affected system. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow). Microsoft has published an official fix to remediate this issue, as detailed in their security update guide.

An authorized local attacker can exploit this heap-based buffer overflow to elevate their privileges, potentially gaining higher-level access to the system. The impact includes full confidentiality, integrity, and availability compromise as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.

An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83971 for detailed patch information and installation instructions.