Wi-Fi-enabled computers are sitting ducks for code execution attacks because of <A HREF="http://www.eweek.com/article2/0,1895,1998452,00.asp?kc=EWNAVEMNL080306EOAD">gaping flaws in wireless drivers</A> shipped on both Mac and Windows systems, security researchers warned at the Black Hat Briefings security conference. A pair of hackers demonstrated such a break-in on an Apple MacBook laptop fitted with a wireless card that was broadcasting its presence to another computer set up as an access point.