Errors in the processing of personal data?

Question

MTS

I opened the MTS LC on my home computer, but got access to someone else's MTS LC! no password, no sms. Yandex browser writes the connection is protected. Called, people live in my house and recently logged into the account. MTS money is opened, passport data is visible.

Horror! I myself am an MTS subscriber, what should I do?

Answer 1

Well, this is clearly an error on the side of MTS, not Yandex.
So write to MTS - let them figure it out.

Answer 2

Write an article on Habré about the found vulnerability)