Huawei Technologies Co., is experiencing around 1 million cyberattacks a day from both inside and outside the country, a company executive said.
Suffolk said Huawei has defended against most of the cyberattacks, but some old-type computers have been affected. He added the company has not identified the sources of the attacks.
Early last month, Huawei said in a statement that the U.S. administration of President Donald Trump has launched cyberattacks to "infiltrate Huawei's intranet and internal information systems."
The cyberattacks have included a type of theft of confidential information by sending a computer virus by email, Suffolk said.
Huawei is operating in about 170 nations and regions, and has signed commercial contracts related to 5G technology with nearly 50 carriers in around 30 countries, according to the firm.
The United States has been pushing its allies to exclude Huawei from government contracts, while expressing anxiety that its products may facilitate spying activities by the Chinese government.
U.S. President Trump now signalling a softening in blacklist restrictions and progress in trade talks with China.