Verizon Call Filter Flaw Exposed Call Logs of Millions

A security researcher uncovered a critical vulnerability in Verizon's Call Filter iOS app, allowing attackers to access the call history of Verizon Wireless customers without authentication. The flaw exploited a server-side validation weakness, enabling attackers to retrieve call logs and timestamps for any Verizon number. This poses significant privacy and safety risks, especially for vulnerable individuals like domestic abuse survivors, law enforcement, and public figures. Verizon acknowledged and remediated the issue.