CVE-2009-0557

Name: CVE-2009-0557
Creator: NVD / NIST
Published: 2009-06-10T18:30:00.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 58.55%

Last modified Jun 16, 2026

CVE-2009-0557 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability.". CISA has confirmed active exploitation in the wild. EPSS estimates a 58.55% chance of exploitation in the next 30 days.

Description

Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability."

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

58.55%

99.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jun 22, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Office	2000	Sp3
Microsoft	Office	2003	Sp3
Microsoft	Office	2004	—
Microsoft	Office	2007	Sp1
Microsoft	Office	2008	—
Microsoft	Office	xp	Sp3
Microsoft	Office Compatibility Pack	2007	Sp1
Microsoft	Office Excel Viewer	All versions	—
Microsoft	Office Excel Viewer	2003	Sp3
Microsoft	Office Sharepoint Server	2007	Sp1
Microsoft	Open Xml File Format Converter	All versions	—

References

http://osvdb.org/54953Broken Link
http://www.securityfocus.com/bid/35241Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022351Broken Link, Third Party Advisory, VDB Entry
http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlBroken Link, Third Party Advisory, US Government Resource
http://www.vupen.com/english/advisories/2009/1540Broken Link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5564Broken Link
http://osvdb.org/54953Broken Link
http://www.securityfocus.com/bid/35241Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022351Broken Link, Third Party Advisory, VDB Entry
http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlBroken Link, Third Party Advisory, US Government Resource
http://www.vupen.com/english/advisories/2009/1540Broken Link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5564Broken Link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0557US Government Resource

Timeline

Published: Jun 10, 2009
Last Modified: Jun 16, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2009-0557?

How severe is CVE-2009-0557?

CVE-2009-0557 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 58.55% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2009-0557?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-0557?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST