Microsoft Internet Explorer 5.01, 6, and 7 does not properly handle objects that have been incorrectly initialized or deleted, which allows remote attackers to cause a denial of service (crash) and execute arbitrary code via unknown vectors, aka "Uninitialized Memory Corruption Vulnerability."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.