OK, I've looked high and low, and this is all I could find...
Try using KingRoot v7.3 or above ...
What are the dangers of getting root access?
canceled the warranty
you will not receive updates over Wi-Fi
in some cases, the procedure for obtaining root access threatens the failure of your device (but most of the gadget can be revived).
To gain root via "Framaroot"
Download the latest version from the page "Framaroot".
Install the program from the downloaded apk-file to your device.
Run the utility. In that case, if the device is supported by the program, on the main screen you will see a drop-down list of possible actions, which include options for the removal and root. In addition, below there is one or more exploits titles that are available for use.
Tapnite one of the available exploits and tooltip will appear after a few seconds, describing the results of his work. If one method does not work, try another. Sometimes it happens that in the preparation of the superuser "Framaroot" crash randomly. In this case, simply restart the program and try again.
Once you get a hint that the device successfully root, you must restart the device.
I'm not sure if that is device specific however..
Other's say try Towelroot, KingoRoot etc..
You could try to use some sort of Universal Signature to sign an update package and the apply the update using the default OTA firmware via SD Card Update, but I'm sure that the universal signature vulnerability or whatever they called it, has been patched now.