Single SMS can reboot the device and disable the Messaging Hub on Windows Phone 7.5 completely, reported in WinRumors. This vulnerability was discovered by Khaled Salameh and submitted to WinRumors on Monday
|Windows Phone SMS Attack|
Researchers tested the attack on a range of Windows Phone devices, including HTC’s TITAN and Samsung’s Focus Flash. Some devices were running the 7740 version of Windows Phone 7.5, others were on Mango RTM build 7720. The attack is not device specific and appears to be an issue with the way the Windows Phone messaging hub handles messages.
This attack can be launched by Sending a message from Facebook chat or Windows Live Messenger to the phone.
WinRumors and Salameh have reported the issue to Microsoft.