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Chinese Hacking Group Exploits Barracuda Zero-Day to Target Government, Military, and Telecom

August 29, 2023

A suspected Chinese-nexus hacking group exploited a recently disclosed zero-day flaw in Barracuda Networks Email Security Gateway (ESG) appliances to breach government, military, defense and aerospace, high-tech industry, and telecom sectors as part of a global espionage campaign.

Mandiant, which is tracking the activity under the name UNC4841, described the threat actor as “highly responsive to defensive efforts” and capable of actively tweaking their modus operandi to maintain persistent access to targets.

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