In addition to Mac OS X 10.6.7 Apple has released Security Update 2011-001 for Mac OS X 10.5.8 Leopard for both Client and Server edition of that operating system.
Security Update 2011-001 fixes 55 security issues including AirPort, Apache, AppleScript, Terminal, QuickTime, X11, several Core services, and more.
For more information about the security issues addressed: About the security content of Mac OS X v10.6.7 and Security Update 2011-001.
To install the update click the Apple logo then choose Software Update.
Direct download links:
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