Executive brief
A security vulnerability has been identified in the Windows Kernel, the core component of the Microsoft Windows operating system. This flaw allows an individual who already has basic access to a computer to gain full administrative control over the system. Such an exploit could allow an attacker to bypass security restrictions, access sensitive data, or install persistent malicious software.
Technical details
This vulnerability is classified as a use-after-free (CWE-416) within the Windows Kernel. An attacker with local access and low-level privileges can exploit this flaw to execute code in kernel mode, leading to a full privilege escalation. The attack requires the attacker to be authenticated (PR:L) and involves high complexity (AC:H), but successful exploitation results in a scope change (S:C), granting the attacker complete control over the affected system. Microsoft has released security updates to address this issue across various versions of Windows 10, Windows 11, and Windows Server 2012.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All editions including Server Core
Timeline
- 2026-07-14: disclosed: Initial disclosure by Microsoft and NVD publication.
- 2026-07-14: advisory: Microsoft Security Update Guide published.