You may experience issues pairing, connecting or using certain Bluetooth devices after installing security updates released June 11, 2019. These security updates address a security vulnerability by intentionally preventing connections from Windows to unsecure Bluetooth devices. Any device using well-known keys to encrypt connections may be affected, including certain security fobs.
For more information, see CVE-2019-2102.
If you experience issues pairing, connecting or using Bluetooth devices after installing any of the affected security updates, please contact the manufacturer of your Bluetooth device to determine if a device update exits.
Advanced users can verify if their device is affected by checking Event Log for the following event:
|Event Source||BTHUSB or BTHMINI|
|Event Message Text||Your Bluetooth device attempted to establish a debug connection. The Windows Bluetooth stack does not allow debug connection while it is not in the debug mode.|
The following latest cumulative update (LCU) and Monthly Rollups released on June 11, 2019 or later for the affected platforms will experience the new behavior:
- KB4503293 or later LCU for Windows 10, version 1903.
- KB4503327 or later LCU for Windows 10, version 1809 and Windows Server 2019.
- KB4503286 or later LCU for Windows 10, version 1803.
- KB4503284 or later LCU for Windows 10, version 1709.
- KB4503279 or later LCU for Windows 10, version 1703.
- KB4503267 or later LCU for Windows 10, version 1607 and Windows Server 2016.
- KB4503291 or later LCU for Windows 10, version 1507.
- KB4503276 or later Monthly Rollup for Windows 8.1 and Windows Server 2012 R2.
- KB4503285 or later Monthly Rollup for Windows Server 2012 and Windows Embedded 8 Standard.
The following Security Only updates are also affected: