Pfizer disclosed that Social Security numbers and other personal data of about 17,000 of its current and former workers were exposed. A company employee installed unauthorized file-sharing software on a company laptop provided for use at her home. Pfizer says 15,700 of the workers’ data was accessed and copied off the laptop by an unknown number of people on a peer-to-peer (P2P) network. The incident serves as a stark example of the potential security dangers presented by P2P software.”]
Source: https://www.csoonline.com/article/2122483/pfizer-breach-illustrates-risks-of-sharing-files.html