Yota.ru

In late 2013 the Russian mobile operator Yota suffered a significant data exposure affecting approximately 1.8 million subscribers. The breach included highly sensitive personal information such as full names, residential addresses, and passport details. Additionally, the leaked data contained tax identification numbers (INN), multiple associated phone numbers, specific tariff plan details, and unique IMSI codes for subscriber devices. This incident represented a major privacy failure for the telecommunications provider at the time, exposing users to risks of identity theft and targeted social engineering.