CVE-2009-0558

Array index error in Excel in Microsoft Office 2000 SP3 and Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac, allows remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Array Indexing Memory Corruption Vulnerability."

Published: 2009-06-10 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0558 is rated High Risk (69.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 53.75%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. 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.

Exploit prediction scoring system (EPSS) score for CVE-2009-0558

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 2025-12-27 55.71% 53.75% -1.96%
2 2025-03-30 56.31% 55.71% -0.60%
3 2025-03-29 — 56.31% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0558

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2009-0558

Affected software / configurations for CVE-2009-0558

Vendor Product Version Raw CPE
microsoft office 2004 cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
microsoft office 2008 cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
microsoft office xp cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
microsoft office_compatibility_pack_for_word_excel_ppt_2007 — cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp1:*:*:*:*:*:*
microsoft office_compatibility_pack_for_word_excel_ppt_2007 — cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp2:*:*:*:*:*:*
microsoft office_excel 2000 cpe:2.3:a:microsoft:office_excel:2000:sp3:*:*:*:*:*:*
microsoft office_excel 2003 cpe:2.3:a:microsoft:office_excel:2003:sp3:*:*:*:*:*:*
microsoft office_excel 2007 cpe:2.3:a:microsoft:office_excel:2007:sp1:*:*:*:*:*:*
microsoft office_excel 2007 cpe:2.3:a:microsoft:office_excel:2007:sp2:*:*:*:*:*:*
microsoft office_excel_viewer — cpe:2.3:a:microsoft:office_excel_viewer:*:*:*:*:*:*:*:*
microsoft office_excel_viewer 2003 cpe:2.3:a:microsoft:office_excel_viewer:2003:sp3:*:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp1:x32:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp1:x64:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp2:x32:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp2:x64:*:*:*:*:*
microsoft open_xml_file_format_converter — cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:*

References for CVE-2009-0558

cvelogic Threat Intelligence