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Vulnerability record · CVE-2009-0100 · published 15 April 2009

CVE-2009-0100: Microsoft office vulnerability

Microsoft · Office

Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel in Microsoft Office 2004 and 2008 for Mac; Microsoft Office Excel Viewer and Excel Viewer 2003 SP3; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 do not properly parse the Excel spreadsheet file format, which allows remote attackers to execute arbitrary code via a crafted spreadsheet that contains a malformed object with "an offset and a two-byte value" that trigger a memory calculation error, aka "Memory Corruption Vulnerability."

9.3 CVSS 2.0 High EPSS 29% · top 1.9% CWE-399 · CWE-399
9.3CVSS 2.0 base score
29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References
16 Jun 2026Last modified by NVD

Description

Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel in Microsoft Office 2004 and 2008 for Mac; Microsoft Office Excel Viewer and Excel Viewer 2003 SP3; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 do not properly parse the Excel spreadsheet file format, which allows remote attackers to execute arbitrary code via a crafted spreadsheet that contains a malformed object with "an offset and a two-byte value" that trigger a memory calculation error, aka "Memory Corruption Vulnerability."

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/53665
http://www.fortiguardcenter.com/advisory/FGA-2009-16.html
http://www.securityfocus.com/archive/1/502696/100/0/threaded
http://www.securitytracker.com/id?1022039
http://www.us-cert.gov/cas/techalerts/TA09-104A.html US Government Resource
http://www.vupen.com/english/advisories/2009/1023
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6043
http://osvdb.org/53665
http://www.fortiguardcenter.com/advisory/FGA-2009-16.html
http://www.securityfocus.com/archive/1/502696/100/0/threaded
http://www.securitytracker.com/id?1022039
http://www.us-cert.gov/cas/techalerts/TA09-104A.html US Government Resource
http://www.vupen.com/english/advisories/2009/1023
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6043

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0100), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.