Patch Tuesday has arrived. As expected, Microsoft released a relatively small number of patches for July, but that is no reason for IT admins to let their guard down--especially when one of the patches is a Critical update for Windows 7 and Windows Vista.

There are three security bulletins rated as Important that impact Windows and Microsoft Office. One is related to Microsoft Visio, one is connected to the client / server runtime subsystem, and the third has to do with kernel-mode drivers. But, the security bulletin that is hogging the attention this month is MS11-053.

According to Microsoft, the critical flaw lays in the Windows Bluetooth Stack--the driver that enables Windows to connect with Bluetooth devices. An attacker may be able to remotely compromise and gain full access to a vulnerable system via its Bluetooth networking. Microsoft also points out, though, that this vulnerability only affects systems with Bluetooth capability.

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