CVE-2009-0561: Integer overflow in Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007…
Noroxi assessment
Priority: Plan (action score 48/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 36.8% (FIRST EPSS); higher than 98.5% of all records.
- According to the record, no fixed version is available yet.
Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Integer overflow in 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; Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2; and Microsoft Office SharePoint Server 2007 SP1 and SP2 allows remote attackers to execute arbitrary code via an Excel file with a Shared String Table (SST) record with a numeric field that specifies an invalid number of unique strings, which triggers a heap-based buffer overflow, aka "Record Integer Overflow Vulnerability."
- Published
- Jun 10, 2009
- Updated
- Jun 16, 2026
- EPSS
- 36.8% · 98th percentile
- CWE
- CWE-189
Report tools
Action score
48
Add it to your regular patch cycle.
- CVSS
- 37 / 40 · 9.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 11 / 30 · 36.8%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| microsoft | office | cpe:2.3:a:microsoft:office |
| microsoft | office compatibility pack for word excel ppt 2007 | cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007 |
| microsoft | office excel | cpe:2.3:a:microsoft:office_excel |
| microsoft | office excel viewer | cpe:2.3:a:microsoft:office_excel_viewer |
| microsoft | office sharepoint server | cpe:2.3:a:microsoft:office_sharepoint_server |
| microsoft | open xml file format converter | cpe:2.3:a:microsoft:open_xml_file_format_converter |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft office2004
- microsoft office2008
- microsoft officexp
- microsoft office compatibility pack for word excel ppt 2007all versions
- microsoft office excel2000
- microsoft office excel2003
- microsoft office excel2007
- microsoft office excel viewerall versions
+3 more rows
- microsoft office excel viewer2003
- microsoft office sharepoint server2007
- microsoft open xml file format converterall versions
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2012-0158The (1) ListView, (2) ListView2, (3) TreeView, and (4) TreeView2 ActiveX controls in MSCOMCTL.OCX in the Common Controls in Microsoft…KEV95Now
- CVE-2018-0798Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code…KEV94Now
- CVE-2017-11882Microsoft Office 2007 Service Pack 3, Microsoft Office 2010 Service Pack 2, Microsoft Office 2013 Service Pack 1, and Microsoft Office 2016…KEV91Now
Published before and after this one in the same product
- ← EarlierCVE-2009-0559Jun 10, 2009 · Stack-based buffer overflow in Excel in Microsoft Office 2000 SP3 and Office XP SP3 allows remote attackers to execute arbitrary code via a…46Plan
- ← EarlierCVE-2009-0560Jun 10, 2009 · 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…45Plan
- Later →CVE-2009-1134Jun 10, 2009 · Excel in 2007 Microsoft Office System SP1 and SP2; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel…48Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-189 · Numeric ErrorsCVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (0)
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Show all references (9 more)Show less
- osvdb.org/54957
- secunia.com/secunia_research/2009-12/
- www.securityfocus.com/archive/1/504190/100/0/threaded
- www.securityfocus.com/bid/35245
- www.securitytracker.com/id?1022351
- www.us-cert.gov/cas/techalerts/TA09-160A.html
- www.vupen.com/english/advisories/2009/1540
- docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5925
Vendor advisories and official records. Exploit/PoC links are deliberately left out.