Executive brief
A security vulnerability has been identified in the Windows NTFS file system, which is responsible for how the computer stores and retrieves files on the hard drive. An attacker who already has basic access to a computer could exploit this flaw to gain full administrative control over the system. This could allow them to view sensitive data, install malicious software, or disrupt business operations.
Technical details
This vulnerability is a stack-based buffer overflow (CWE-121) residing within the Windows NTFS file system driver. The flaw is triggered locally by an authenticated user, though it requires some level of user interaction according to the CVSS vector (UI:R). Successful exploitation allows a low-privileged attacker to execute code with elevated system privileges, potentially gaining full control of the affected host. Microsoft has released security updates to address this issue across multiple 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 versions
Timeline
- 2026-07-14: advisory: Initial advisory published by Microsoft and NVD.
- 2026-07-14: patched: Security updates made available via Microsoft Update Guide.