Array index vulnerability in Microsoft Office Excel 2000 SP3, 2002 SP3, and 2003 SP3; Excel Viewer 2003 Gold and SP3; Office 2004 and 2008 for Mac; and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via an Excel spreadsheet with a NAME record that contains an invalid index value, which triggers stack corruption, aka "Excel Global Array Memory Corruption Vulnerability."
Conclusion & alert: CVE-2008-4266 is rated High Risk (66.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 27.58%, 98th 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 | 59.29% | 27.58% | -31.70% |
| 2 | 2025-06-28 | 63.59% | 59.29% | -4.30% |
| 3 | 2025-05-01 | — | 63.59% | — |
Full EPSS history (25 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] |
: http://www.microsoft.com/technet/security/Bulletin/MS08-074.mspx Excel Global Array Memory Corruption Vulnerability - CVE-2008-4266 A remote code execution vulnerability exists in Microsoft Office Excel as a result of stack corruption when loading Excel records. The vulnerability could allow remote code execution if a user opens a specially crafted Excel file that includes a malformed object. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | excel | 2000 | cpe:2.3:a:microsoft:excel:2000:sp3:*:*:*:*:*:* |
| microsoft | excel | 2002 | cpe:2.3:a:microsoft:excel:2002:sp3:*:*:*:*:*:* |
| microsoft | excel | 2003 | cpe:2.3:a:microsoft:excel:2003:sp3:*:*:*:*:*:* |
| 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:*:mac:*:*:*:*:* |
| microsoft | office | 2008 | cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:* |
| microsoft | open_xml_file_format_converter | — | cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:* |