An article from Threat post  on Vulnerabilities Continue to Weigh Down Samsung Android Phones:

Attackers have long had an affinity for having their way with Android phones, but the hammer seems to have really come down over the last few months when it comes to devices manufactured by Samsung.

Independent Italian researcher Roberto Paleari discussed several bugs he recently found in Samsung Android phones in a post on his blog yesterday. Paleari claims that after taking some time to sit down with some of his devices, he found six exploitable bugs on older devices such as the Galaxy Tab and the newer Galaxy S3.

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