According to a Forbes.com article, the Huawei security chief, John Suffolk claims Huawei is cyber attacked almost 1 million times per day on the Huawei networks and computers. According to their security chief, most of the attacks are looking for intellectual property theft as Huawei leads the world in 5G technology. In response to these attacks, Huawei has pledged to work with their customers to secure their defenses from further cyber attacks.
On the other hand, the US government has alleged that Huawei receives Chinese state support and as such is subject to assisting Beijing with intelligence gathering overseas through backdoors in their hardware.
The US is not alone in its suspicion, the Forbes article also cites a EU report warning of the “combination of new technologies and 5G networks risks hostile state control of critical infrastructure, logistics, transportation even law enforcement”. The EU report did not cite China or Huawei but the article did indicate that 5G suppliers from countries “with poor democratic standards,” for which the reference to Huawei and China was clear.