Executive brief
A security vulnerability exists in Windows Storage Spaces Direct, a technology used to create highly available and scalable storage solutions. An attacker with physical access to a server or workstation could exploit this flaw to gain higher-level administrative privileges on the system. This could lead to unauthorized access to sensitive data or full control over the affected machine.
Technical details
An integer overflow (CWE-190) exists within the Windows Storage Spaces Direct component. The vulnerability is triggered via a physical attack vector, meaning the attacker must have direct physical access to the hardware. By exploiting this overflow or wraparound condition, an unauthenticated attacker can achieve local privilege escalation (LPE), gaining SYSTEM-level access. Microsoft has released security updates to address this issue across multiple versions of Windows 10, Windows 11, and Windows Server.
Affected products
- Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
- Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
- Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
- Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows Server 2016 10.0.14393.0 to 10.0.14393.9339
Timeline
- 2026-07-14: disclosed: Initial publication by Microsoft and NVD
- 2026-07-14: advisory