Buffer overflow in certain Asian language versions of Microsoft Excel might allow user-assisted attackers to execute arbitrary code via a crafted STYLE record in a spreadsheet that triggers the overflow when the user attempts to repair the document or selects the "Style" option, as demonstrated by nanika.xls. NOTE: Microsoft has confirmed to CVE via e-mail that this is different than the other Excel vulnerabilities announced before 20060707, including CVE-2006-3059 and CVE-2006-3086.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A431
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-059
http://www.vupen.com/english/advisories/2006/2689
http://www.securityfocus.com/archive/1/449179/100/0/threaded
http://www.securityfocus.com/archive/1/439427/100/0/threaded
http://www.securityfocus.com/archive/1/438963/100/0/threaded
http://securitytracker.com/id?1016430