Popular 3G/4G data dongles are desperately vulnerable, say hackers

Vulnerable to remote code execution.
Richard Chirgwin
Cellular modems from four vendors have been popped by security researchers, who have documented cross-site scripting (XSS), cross-site request forgery (CSRF), remote code execution (RCE) and integrity attacks on the products.
The research published by Positive Technologies and carried out by the SCADA Strangelove team looked at modems from Huawei, Gemtek, Quanta and ZTE.
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Source: http://www.theregister.co.uk/