Twitter, Pinterest, Tumblr on edge after customer support company gets hacked

It seems that no big company is safe from cyber-criminals right now: a hack attack on customer support service company Zendesk may have exposed user data from social networking websites Twitter, Tumblr and Pinterest.Zendesk, a customer service outsourcing firm that caters to over 25,000 clients, yesterday announced a security breach of its systems. This breach exposed user data of three of their unnamed customers to hackers. The three customers were later reported to be Twitter, Tumblr and Pinterest. The company said it believed that the hackers downloaded email addresses of users who contacted the three companies for support, as well as support email subject lines.