Stack-based buffer overflow in Microsoft Excel 2000 SP3, 2002 SP3, 2003 SP2 and SP3, and 2007 Gold and SP1; Office Excel Viewer 2003 SP3; Office Excel Viewer; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Gold and SP1; Office 2004 and 2008 for Mac; and Open XML File Format Converter for Mac allows remote attackers to execute arbitrary code via a BIFF file with a malformed record that triggers a user-influenced size calculation, aka "File Format Parsing Vulnerability."
Conclusion & alert: CVE-2008-3471 is rated High Risk (66.8/100): CVSS Critical severity, with high exploitation likelihood (EPSS 52.32%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 73.24% | 52.32% | -20.92% |
| 2 | 2026-02-28 | 66.32% | 73.24% | +6.92% |
| 3 | 2026-01-22 | — | 66.32% | — |
Full EPSS history (24 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | excel | 2003 | cpe:2.3:a:microsoft:excel:2003:sp2:*:*:*:*:*:* |
| microsoft | excel | 2003 | cpe:2.3:a:microsoft:excel:2003:sp3:*:*:*:*:*:* |
| microsoft | excel | 2007 | cpe:2.3:a:microsoft:excel:2007:-:*:*:*:*:*:* |
| microsoft | excel | 2007 | cpe:2.3:a:microsoft:excel:2007:sp1:*:*:*:*:*:* |
| microsoft | excel_viewer | — | cpe:2.3:a:microsoft:excel_viewer:-:*:*:*:*:*:*:* |
| microsoft | excel_viewer | 2003 | cpe:2.3:a:microsoft:excel_viewer:2003:-:*:*:*:*:*:* |
| microsoft | excel_viewer | 2003 | cpe:2.3:a:microsoft:excel_viewer:2003:sp3:*:*:*:*:*:* |
| microsoft | office | 2004 | cpe:2.3:a:microsoft:office:2004:*:*:*:*:macos:*:* |
| microsoft | office | 2008 | cpe:2.3:a:microsoft:office:2008:*:*:*:*:macos:*:* |
| microsoft | office_compatibility_pack | 2007 | cpe:2.3:a:microsoft:office_compatibility_pack:2007:-:*:*:*:*:*:* |
| microsoft | office_compatibility_pack | 2007 | cpe:2.3:a:microsoft:office_compatibility_pack:2007:sp1:*:*:*:*:*:* |
| microsoft | open_xml_file_format_converter | — | cpe:2.3:a:microsoft:open_xml_file_format_converter:-:*:*:*:*:macos:*:* |
| URL | Tags |
|---|---|
| http://marc.info/?l=bugtraq&m=122479227205998&w=2 | Issue Tracking Mailing List Third Party Advisory |
| http://secunia.com/advisories/32211 | Patch Vendor Advisory |
| http://www.securityfocus.com/bid/31705 | Patch Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id?1021044 | Third Party Advisory VDB Entry |
| http://www.us-cert.gov/cas/techalerts/TA08-288A.html | Third Party Advisory US Government Resource |
| http://www.vupen.com/english/advisories/2008/2808 | Third Party Advisory |
| http://www.zerodayinitiative.com/advisories/ZDI-08-068/ | Third Party Advisory VDB Entry |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-057 | Patch Vendor Advisory |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/45579 | Third Party Advisory VDB Entry |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/45581 | Third Party Advisory VDB Entry |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5750 | Third Party Advisory |