SonicWall announced three zero-day vulnerabilities in its email security solution. (SonicWall)

SonicWall’s email security solution is supposed to help protect customers from phishing attacks, business email compromise, ransomware and other email related threats. However, it appears some attackers have been using previously unknown cybersecurity vulnerabilities in the very same product to break into victim networks.  

Yesterday, the company announced three zero-day vulnerabilities found in SonicWall Email Security. They include a damaging bug that allows an unauthorized user to create administrative accounts on a network (CVE-2021-20021) and two others that allow an already-authenticated attacker to read (CVE-2021-20023) and upload (CVE-2021-20022) files on the victim’s remote host. Together they can be used to access and read a victim’s files or emails, plant malware and conduct other post-compromise activities.

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