PC Bluetooth Stack Security Patch 2: For (32- and 64-bit) Bluetooth Stack versions: - 3.xx.xx - 4.00.00 - 4.00.29 (Toshiba Bluetooth-stack and all OEM versions) - Not required for later versions. All updates are already included in it. The Bluetooth-stack version gets the extention "SP2" after Bluetooth Security Patch 2 was successfully installed. Here are the major change points of Bluetooth Security Patch 2: - Fix the OBEX "Directory Transversal" issue (=Bluetooth Security Patch 1) - Fix L2CAP echo issue