Barracuda Email Security Gateway devices have again been violated, this time through a novel backdoor malware named 'Whirlpool.' The US Cybersecurity and Infrastructure Security Agency (CISA) has identified the breach to be the work of a pro-China group of hackers. The threat actors have targeted a zero-day remote command injection vulnerability through the malware. Reports say this vulnerability was used to plant malware payloads of Seapsy and Whirlpool backdoors on compromised devices.