Suspected state-backed Chinese hackers used a security hole in a popular email security appliance to break into the networks of hundreds of public and private sector organizations globally, nearly a third of them government agencies, including foreign ministries, cybersecurity firm Mandiant said Thursday.
“This is the broadest cyber espionage campaign known to be conducted by a China-nexus threat actor since the mass exploitation of Microsoft Exchange in early 2021,” Charles Carmakal, Mandiant’s chief technical officer, said.
