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Microsoft Excel fails to properly handle Lotus 1-2-3 files

Vulnerability Note VU#821772

Original Release Date: 2006-10-10 | Last Revised: 2007-02-27


Microsoft Excel contains a vulnerability in the handling of malformed Lotus 1-2-3 files, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


Microsoft Excel contains an unspecified vulnerability that could be exploited when Excel opens a specially crafted Lotus 1-2-3 document. This vulnerability affects both Windows and Mac versions of Excel.


By convincing a user to open a specially crafted Lotus 1-2-3 document, an attacker could execute arbitrary code with the privileges of the user running Excel. If the user is logged in with administrative privileges, the attacker could take complete control of a vulnerable system. This vulnerability may also cause Excel to crash.


Apply an update

This vulnerability is addressed in Microsoft Security Bulletin MS06-059.

Do not open untrusted Lotus 1-2-3 documents

Do not open unfamiliar or unexpected Lotus 1-2-3 or other Office documents, particularly those hosted on web sites or delivered as email attachments. Please see Cyber Security Tip ST04-010.

Vendor Information


Microsoft Corporation Affected

Updated:  October 10, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Please see Microsoft Security Bulletin MS06-059.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



This vulnerability was publicly disclosed by Benjamin Tobias Franz.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2006-3867
Severity Metric: 38.73
Date Public: 2006-10-10
Date First Published: 2006-10-10
Date Last Updated: 2007-02-27 19:36 UTC
Document Revision: 4

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