This vulnerability, identified as CVE-2026-27924, involves a use-after-free condition in the Desktop Window Manager of Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, impacting confidentiality, integrity, and availability of the system. Microsoft has published an official fix to remediate this vulnerability.

An authorized local attacker could exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 10 system. This could allow the attacker to execute code with higher privileges, potentially compromising system confidentiality, integrity, and availability. 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 21H2 (build 10.0.19044.0) as soon as possible to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory for detailed update instructions.