SonicWall warns customers about zero-day vulnerabilities Attack targets SonicWall's SMA Series access management gateways and is another in a string of incidents against security vendors Credit: Dreamstime Firewall and network security appliance manufacturer SonicWall is urging customers to take preventive actions after its own systems were attacked through previously unknown vulnerabilities in some of its products. "Recently, SonicWall identified a coordinated attack on its internal systems by highly sophisticated threat actors exploiting probable zero-day vulnerabilities on certain SonicWall secure remote access products," the company said in an alert on its website late Friday. Initially the company suspected that several of its Secure Mobile Access (SMA) series physical and virtual appliances, as well as the NetExtender VPN client and SonicWall firewalls were vulnerable. However, after further investigation, the list of vulnerable products was revised Saturday.