The company posts guidelines for Yahoo users worried about infection and says people outside Europe may have been hit. It also says the attacks went on longer than previously reported.

Ben-Gurion University of the Negev, Galaxy S4, Jonathan Cheng, Knox, malware, Samsung, security vulnerability, Wall Street Journal, WSJDN

The security platform for Samsung Electronics Co.’s best-selling Galaxy S4 smartphone suffers from a vulnerability that could allow malicious software to track emails and record data communications, according to cybersecurity researchers at Israel’s Ben-Gurion University of the Negev.