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Urgent FBI Warning: Barracuda Email Gateways Vulnerable Despite Recent Patches

August 25, 2023

The U.S. Federal Bureau of Investigation (FBI) is warning that Barracuda Networks Email Security Gateway (ESG) appliances patched against a recently disclosed critical flaw continue to be at risk of potential compromise from suspected Chinese hacking groups.

It also deemed the fixes as “ineffective” and that it “continues to observe active intrusions and considers all affected Barracuda ESG appliances to be compromised and vulnerable to this exploit.”

Tracked as CVE-2023-2868 (CVSS score: 9.8), the zero-day bug is said to have been weaponized as early as October 2022, more than seven months before the security hole was plugged. Google-owned Mandiant is tracking the China-nexus activity cluster under the name UNC4841.

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