Experts at Kromtech Security Research Center discovered a new Verizon leak exposed confidential and sensitive data on internal systems. Leaked data includes server logs and credentials for internal systems, the huge trove of documents was found on an unprotected Amazon S3 bucket. The archive seems to refer to internal Verizon Wireless systems, known as Distributed Vision Services (DVS), that is a middleware system used by the company to deliver data from the back-end systems to the front-end applications used by employees in stores and call centers.”]
Source: https://securityaffairs.co/wordpress/63304/data-breach/new-verizon-data-leak.html