A US telemarketing company has leaked the personal details of potentially tens of thousands of consumers after misconfiguring a cloud storage bucket , Infosecurity can reveal . A team at vpnMentor led by Noam Rotem found the unsecured AWS S3 bucket on December 24 last year . It was traced to Californian business CallX , whose analytics services are apparently used by clients to improve their media buying and inbound marketing . According to its website , the firm counts lending marketplace Lendingtree , Liberty Mutual Insurance and smart security vendor Vivint among its customers . Rotem found 114,000 files left publicly accessibly in the leaky bucket . Most of these were audio recordings of phone conversations between CallX clients and their customers , which were being tracked by the firm ’s marketing software . An additional 2000 transcripts of text chats were also viewable . Personally identifiable information ( PII ) contained in these files included full names , home addresses , phone numbers and more . With the leaked data , attackers could launch convincing phishing , fraud and vishing attacks , warned vpnMentor . ;