Unspecified vulnerability in Internet Explorer 6.0 on Microsoft Windows XP SP2 allows remote attackers to execute arbitrary code via "exceptional conditions" that trigger memory corruption, as demonstrated using an exception handler and nested object tags, a variant of CVE-2006-1992.

mshtml.dll 6.00.2900.2873, as used in Microsoft Internet Explorer, allows remote attackers to cause a denial of service (crash) via nested OBJECT tags, which trigger invalid pointer dereferences including NULL dereferences. NOTE: the possibility of code execution was originally theorized, but Microsoft has stated that this issue is non-exploitable.