UNC4841 threat actors hacked US government email servers exploiting Barracuda ESG flaw

China-linked threat actors breached government organizations worldwide with attacks exploiting Barracuda ESG zero-day.

In June, Mandiant researchers linked the threat actor UNC4841 to the attacks that exploited the recently patched Barracuda ESG zero-day vulnerability to China.

“Through the investigation, Mandiant

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