Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
Microsoft Internet Explorer 6 and 7 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not initialized or (2) is deleted, aka "Layout Memory Corruption Vulnerability."
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Asynchronous NULL Object Access Remote Code Execution Vulnerability."
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a malformed virtual function table after this table's deletion, aka "Virtual Function Table Corruption Remote Code Execution Vulnerability."
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "OnBeforeDeactivate Event Remote Code Execution Vulnerability."
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by attempting to access an undefined memory location, aka "insertAdjacentText Remote Code Execution Vulnerability."
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "insertRow Remote Code Execution Vulnerability."
Microsoft Internet Explorer 6 through 9 does not block cross-domain scrolling events, which allows remote attackers to read content from a different (1) domain or (2) zone via a crafted web site, aka "Scrolling Events Information Disclosure Vulnerability."
Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Center Element Remote Code Execution Vulnerability."
Cross-site scripting (XSS) vulnerability in Microsoft Internet Explorer 6 through 9 allows remote attackers to inject arbitrary web script or HTML via crafted character sequences with EUC-JP encoding, aka "EUC-JP Character Encoding Vulnerability."