Microsoft Excel Multiple Vulnerabilities

Some vulnerabilities have been reported in Microsoft Excel, which can be exploited by malicious people to compromise a user's system.

1) An error while validating an index value in a NAME record can be exploited to corrupt memory via a specially crafted Excel Spreadsheet (XLS) file.

2) An unspecified error in the processing of Excel records can be exploited to corrupt memory via a specially crafted XLS file.

3) An unspecified error in the processing of Excel formulas can be exploited to corrupt memory via a specially crafted XLS file.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.

Patches are available for these critical issues.