Amazon ordered security researchers to investigate the technology of the company they wanted to acquire which is Elemental Technologies. The team of security researchers performed tests on the servers and found microchips as small as rice grains on these devices. These chips served as potential backdoors to these systems and can possibly input malicious code. Amazon immediately found a way to dispose of these infected infrastructures by selling their assets in Beijing. In 2014, lawyer and journalist Glenn Greenwald showed photos of the National Security Agency or the NSA tampering with Cisco routers bound for shipping overseas by placing beacons in them.”]
Source: https://hackercombat.com/your-network-hardware-maybe-aiding-spies-right-now/