China Accuses US of Hacking Huawei Servers as Far Back as 2009

China accused the US of infiltrating Huawei Technologies Co. servers beginning in 2009, part of a broad-based effort to steal data that culminated in tens of thousands of cyber-attacks against Chinese targets last year.

The Tailored Access Operations unit of the National Security Agency carried out the attacks in 2009, which then continuously monitored the servers, China’s Ministry of State Security said in a post on its official WeChat account on Wednesday. It didn’t provide details of attacks since 2009.

Cyberattacks are a point of tension between Washington and Beijing, which has accused its political rival of orchestrating attacks against ...