This vulnerability involves a use-after-free condition in the QWAVE service of Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-416 and has a CVSS v3.1 base score of 7.0, indicating high severity. Microsoft has released an official fix for this issue, and details are available in their security update guide.

An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges, which could lead to full system compromise depending on the privileges gained. The confidentiality, integrity, and availability of the affected system can be fully impacted 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 to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54989 for detailed patch information and deployment instructions.