Affected: MAS (a Carrier brand) MASmobile Classic, MAS (a Carrier brand) MAS ASP.Net Services, carrier masmobile_classic, carrier mas_asp.net_services

Authorization bypass can be achieved by session ID prediction in MASmobile Classic Android  version 1.16.18 and earlier and

MASmobile Classic iOS version 1.7.24 and earlier

which allows remote attackers to retrieve sensitive data  including customer data, security system status, and event history.