QuickTime 7.5 patches a number of security issues:
Windows Vista, XP SP2:
Opening a maliciously crafted PICT image file may lead to an unexpected application termination or arbitrary code execution
Mac OS X v10.3.9, Mac OS X v10.4.9 - v10.4.11, Mac OS X v10.5 or later, Windows Vista, XP SP2:
Opening a maliciously crafted AAC-encoded media content may lead to an unexpected application termination or arbitrary code execution
Mac OS X v10.3.9, Mac OS X v10.4.9 - v10.4.11, Mac OS X v10.5 or later, Windows Vista, XP SP2:
Opening a maliciously crafted PICT image file may lead to an unexpected application termination or arbitrary code execution
Mac OS X v10.3.9, Mac OS X v10.4.9 - v10.4.11, Mac OS X v10.5 or later, Windows Vista, XP SP2:
Viewing maliciously crafted Indeo video media content may lead to an unexpected application termination or arbitrary code execution
Mac OS X v10.3.9, Mac OS X v10.4.9 - v10.4.11, Mac OS X v10.5 or later, Windows Vista, XP SP2:
Playing maliciously crafted QuickTime content in QuickTime Player may lead to arbitrary code execution