Apple has posted released AirPort Base Station Update 2010-001, which brings the Airport Utility to version 5.5.1. The update — which requires Mac OS X 10.5.7 or later — addresses two bugs and includes a security fix.

The security patch addresses an issue that would have allowed an unauthorized user to connect to an otherwise restricted network. You can obtain the update via the Software Updates component of Mac OS X’s Systems Preferences app.