US and allies, including the European Union, the United Kingdom, and NATO, are officially blaming China for this year’s widespread Microsoft Exchange hacking campaign. These early 2021 cyberattacks targeted over a quarter of a million Microsoft Exchange servers, belonging to tens of thousands of organizations worldwide. The White House attributes “with a high degree of confidence”” that malicious cyber actors affiliated with PRC s MSS conducted cyber espionage operations utilizing the zero-day vulnerabilities in Microsoft Exchange Server disclosed in early March 2021.”””
Source: https://www.bleepingcomputer.com/news/security/us-and-allies-officially-accuse-china-of-microsoft-exchange-attacks/