An anonymous reader writes: Security researchers have found yet another flaw in Android's Stagefright. The researchers were able to remotely hack an Android phone by exploiting the bugs. According to their estimation, the flaw exposes devices running Android software version between 5.0-5.1, or 36% of 1.4 billion, to security attacks. "I would be surprised if multiple professional hacking groups do not have working Stagefright exploits by now. Many devices out there are still vulnerable, so Zimperium has not published the second exploit in order to protect the ecosystem," Zuk Avraham, chairman of Zimperium, the firm which found the first Stagefright exploit told Wired.