Security Update 2006-005

Apple has released a Security Update 2006-005. It is available via the software update panel or Apple Download website. It concerns all Macs running Mac OS X 10.3.9 or 10.4.7.
This update fixes potential security flaws when using Airport.
For additional information: http://docs.info.apple.com/article.html?artnum=61798-en
An AirPort Update 2006-001 has been released simultaneously (info):

The AirPort Update 2006-001 improves AirPort reliability on Macintosh computers.