Chinese cyber center points finger at U.S. over alleged cyberattacks to steal trade secrets

China’s CNCERT accused a suspected U.S. intelligence agency of conducting two cyberespionage attacks: one (August) that exploited a document management system to compromise a software upgrade server and deploy Trojans to roughly 270 hosts of an advanced materials research unit, and another (May of the prior year) that abused Microsoft Exchange vulnerabilities to implant backdoors and take control of devices across a large smart‑energy/high‑tech enterprise and its subsidiaries. The notice frames these incidents amid broader China–U.S. accusations of state‑linked cyber activity but does not name a specific U.S. office or provide detailed technical indicators.