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Cybersecurity

Chinese Spies Accused of Using Huawei in Secret Australia Telecom Hack

Software update loaded with malicious code is key evidence in years-long push to block Huawei, officials say

Inside Huawei Technologies Co.'s Campus Ahead Of Industrial Production Figures

Photographer: Brent Lewin/Bloomberg

The U.S. government has warned for years that products from China’s Huawei Technologies Co., the world’s biggest maker of telecommunications equipment, pose a national security risk for any countries that use them. As Washington has waged a global campaign to block the company from supplying state-of-the-art 5G wireless networks, Huawei and its supporters have dismissed the claims as lacking evidence.

Now a Bloomberg News investigation has found a key piece of evidence underpinning the U.S. efforts — a previously unreported breach that occurred halfway around the world nearly a decade ago.