A security vulnerability has been found in a component used by the SonicOS operating system used in SonicWall firewall appliances. SonicWall has made a free patch available and strongly advises applying it immediately. If your SpeedLine network includes a SonicWall appliance (note that some of these appliances may be branded with the Dell name), read on for steps to secure it. This is a PCI-affecting security patch notification. If your network does not include a SonicWall, this advisory does not apply to you.