A security flaw in Verizon's Call Filter app exposed users' call logs. Here's what happened, who was at risk, and how Verizon responded.

A vulnerability in Verizon's Call Filter feature allowed customers to access the incoming call logs for another Verizon Wireless number through an unsecured API request.

Verizon fixed the flaw in March 2025, but users should still be on their guard. ... With unrestricted access to another user's call history, an attacker could reconstruct daily routines, ...

Exposed were text files logging calls made this year to Verizon call centers between Jan. 1 and June 22, ... O’Sullivan said the exposure underscores the rapidly increasing risks of data breaches.

Customer records for at least 14 million subscribers, including phone numbers and account PINs, were exposed.

Femtocell Verizon Hack Allows Exposure Of Phone Conversations, ... points out that he's able to "see everything that your phone would send to a cell phone tower," and this includes phone calls, ...

Millions of Verizon customers may have been at risk of having their call histories exposed through a security flaw in the company's Call Filter app, according to a new report by ethical hacker ...

Given Verizon’s large subscriber base, the app likely has millions of users, as it offers features like spam detection, caller ID, personal block lists, and automatic blocking of high-risk calls.