The flaw, as he explained, was a remotely exploitable "buffer overflow that could have enabled arbitrary code execution." It turns out, as Cooley noted, in many cases, there exists no encryption between a Wi-Fi transceiver and an application processor. Service-set identifiers (SSID) and password information were often left unencrypted. The serial link between a transceiver and a host processor also remained unprotected. Cooley noted, "Data transferred between host processor and Silicon Labs' Wi-Fi chip, for example, is safeguarded with Secure Link to protect information like SSIDs and passwords."