What Happened with Supermicro?
Back in October 2018, a bombshell rocked the tech industry when Bloomberg reported that some motherboards made by Supermicro had malicious components on them that were used to spy or interfere with the operation of the board, and that these motherboards were found on servers used by Amazon and Apple. This is at least in part because some clients have asked Supermicro (and other manufacturers) to move out of China because of security concerns. A few days after the report about Supermicro, they published another separate accusation, this time claiming that the motherboards had Ethernet connectors with malicious hardware inside of them.
Source: hackaday.com