The Apple AirPort card uses a default WEP key when not connected to a known or trusted network, which can cause it to automatically connect to a malicious network.
http://www.securityfocus.com/bid/14321
http://securitytracker.com/id?1014522
Source: Mitre, NVD
Published: 2005-07-19
Updated: 2008-09-05
Base Score: 2.1
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N
Severity: Low
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: High