Verizon confirmed on Wednesday that the personal data of 6 million customers leaked online, according to ZDNet.
The issue was caused by “human error” and was uncovered by cyber security firm UpGuard, and due to a misconfigured security setting on a cloud server.
Phone numbers, names and some PIN codes were publicly available online due to the leak.
No loss or theft of customer information occurred, Verizon said according to CNN Tech.
Chris Vickery, a researcher at UpGuard, found that the data leak came from NICE Systems, an Israel-based company Verizon was working to do customer service calls.
Vickery alerted Verizon on June 13 and the issue was fixed by June 22.
ZDNet first reported the breach.