CVE-2009-0563

Name: CVE-2009-0563
Creator: NVD / NIST
Published: 2009-06-10T18:00:00.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 63.08%

Last modified Jun 16, 2026

CVE-2009-0563 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Stack-based buffer overflow in Microsoft Office Word 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Microsoft Office for Mac 2004 and 2008; Open XML File Format Converter for Mac; Microsoft Office Word Viewer 2003 SP3; Microsoft Office Word Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a Word document with a crafted tag containing an invalid length field, aka "Word Buffer Overflow Vulnerability.". CISA has confirmed active exploitation in the wild. EPSS estimates a 63.08% chance of exploitation in the next 30 days.

Description

Stack-based buffer overflow in Microsoft Office Word 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Microsoft Office for Mac 2004 and 2008; Open XML File Format Converter for Mac; Microsoft Office Word Viewer 2003 SP3; Microsoft Office Word Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a Word document with a crafted tag containing an invalid length field, aka "Word Buffer Overflow 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

63.08%

99.1th 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 Word Viewer	All versions	—
Microsoft	Office Word Viewer	2003	Sp3
Microsoft	Open Xml File Format Converter	All versions	—

References

http://osvdb.org/54959Broken Link
http://www.securityfocus.com/archive/1/504204/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/35188Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022356Broken 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/2009/1546Broken Link
http://www.zerodayinitiative.com/advisories/ZDI-09-035Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-027Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6133Broken Link
http://osvdb.org/54959Broken Link
http://www.securityfocus.com/archive/1/504204/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/35188Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022356Broken 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/2009/1546Broken Link
http://www.zerodayinitiative.com/advisories/ZDI-09-035Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-027Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6133Broken Link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0563US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2009-0563?

How severe is CVE-2009-0563?

CVE-2009-0563 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 63.08% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2009-0563?

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-2009-0563?

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

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Source: NVD / NIST