https://www.theverge.com/2018/6/8/17435764/facebook-data-sharing-huawei-cybersecurity

A series of reports this week revealed that, for the past 10 years, Facebook’s broad sharing of data extended not only to app developers but to phone companies as well. That included an agreement with Huawei, which has already been under intense government scrutiny for potential cybersecurity risks due to its alleged ties to Beijing.

On Sunday, following a New York Times report, Facebook admitted that it had data-sharing partnerships with at least 60 device makers, including Apple, Samsung, and Amazon. These companies received access to user data, including information on a user’s friends without their consent. In some instances, they could even access the information of friends of friends, as one Times reporter with a 2013 BlackBerry found. The admission reveals that the massive Cambridge Analytica data scandal, in which the data of over 87 million Facebook users was mined through a third-party social media app, was not an outlier.