China's Cyber Security Association has accused U.S. intelligence agencies of conducting cyberattacks and espionage targeting China's military industrial sectors. The association alleges that U.S. agencies exploited a vulnerability in Microsoft's email servers, specifically an old Microsoft Exchange zero-day flaw, to gain control over servers of a key Chinese defense company for nearly a year and steal military data. The Chinese Foreign Ministry spokesperson Guo Jiakun confirmed these allegations during a press conference, noting that the U.S. government used countries including Germany, South Korea, Singapore, and the Netherlands as springboards for these cyber operations. Guo described the U.S. as the primary cyber threat to China, highlighting what he called U.S. hypocrisy in its cyber activities. These revelations underscore ongoing tensions between the two countries in the realm of cybersecurity and intelligence.