Usernames and passwords of some of Yahoo's email customers have been stolen and used to gather personal information about people those Yahoo mail users have recently corresponded with, the company said Thursday.
Yahoo reported on Tuesday that its quarterly profit jumped at the end of last year, but revenues sank in a troubling sign for the struggling Internet pioneer.
Struggling Internet giant Yahoo! will see more users accessing its services by mobile in 2014 than classic desktops, chief executive Marissa Mayer said on Wednesday at the Davos World Economic Forum.
Yahoo was the most popular online venue visited from US desktop computers in December as modern lives increasingly revolve around using mobile devices to connect with the Internet.
The axing this week of Yahoo's second-in-command sent a signal that reality is setting in for Silicon Valley sweetheart Marissa Mayer, who leads the struggling Internet pioneer.
Yahoo chief operating officer Henrique de Castro is walking away with a stock award of $20 million as the company struggles to boost revenues, regulatory filings showed.
Yahoo dove deeper into being an Internet Age media company, bringing in news, music and television stars for the launch of online magazines focused on technology and food.
Yahoo is leaning more heavily on its recent acquisitions of technology and talent to as CEO Marissa Mayer tries to attract more traffic and advertising to the Internet company's services.
Under fire from courts and allies over a vast US spying dragnet, President Barack Obama faced new heat Tuesday from Internet titans who fear the surveillance has crossed constitutional lines.