Executive brief
A security vulnerability has been identified in the Windows Bluetooth Service, which manages wireless connections for peripherals like keyboards, mice, and headsets. 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
A heap-based buffer overflow vulnerability (CWE-122) exists within the Windows Bluetooth Service. The flaw is triggered when the service improperly handles memory allocation for Bluetooth-related data structures. An attacker with low-privileged local access can exploit this by sending specially crafted requests to the service, leading to arbitrary code execution with elevated system privileges. Microsoft has released security updates to address this issue across affected versions of Windows 10, 11, and Windows Server.
Affected products
- Microsoft Windows 10 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2019 All versions
- Microsoft Windows Server 2022 All versions
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory