Executive brief
A security vulnerability has been identified in the Windows NTFS file system, which is responsible for how the operating system stores and retrieves files on a 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 classified as an incorrect conversion between numeric types (CWE-681) and a buffer over-read (CWE-126) within the Windows NTFS driver. An attacker with local access and low-level privileges can exploit this flaw by triggering an improper type conversion during file system operations. Successful exploitation allows the attacker to gain SYSTEM-level privileges on the affected host. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server 2012. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows 10 Version 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 Version 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All editions including Server Core
Timeline
- 2026-07-14: advisory: Initial disclosure by Microsoft and NVD publication