CVE-2011-1987

Array index error in Microsoft Excel 2003 SP3 and 2007 SP2; Excel in Office 2007 SP2; Excel 2010 Gold and SP1; Excel in Office 2010 Gold and SP1; Office 2004, 2008, and 2011 for Mac; Open XML File Format Converter for Mac; Excel Viewer SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Out of Bounds Array Indexing Vulnerability."

Published: 2011-09-15 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1987 is rated High Risk (74.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 61.15%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.52% over the last day, indicating growing attacker interest. 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-2011-1987

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 2026-03-17 58.63% 61.15% +2.52%
2 2025-03-30 66.53% 58.63% -7.89%
3 2025-03-29 — 66.53% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1987

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-2011-1987

Affected software / configurations for CVE-2011-1987

Vendor Product Version Raw CPE
microsoft excel 2003 cpe:2.3:a:microsoft:excel:2003:sp3:*:*:*:*:*:*
microsoft excel 2007 cpe:2.3:a:microsoft:excel:2007:sp2:*:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:*:x32:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:*:x64:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp1:x32:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp1:x64:*:*:*:*:*
microsoft excel_viewer — cpe:2.3:a:microsoft:excel_viewer:*:sp2:*:*:*:*:*:*
microsoft office 2004 cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
microsoft office 2007 cpe:2.3:a:microsoft:office:2007:sp2:*:*:*:*:*:*
microsoft office 2008 cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:*:x32:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:*:x64:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:sp1:x32:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:sp1:x64:*:*:*:*:*
microsoft office 2011 cpe:2.3:a:microsoft:office:2011:*:mac:*:*:*:*:*
microsoft office_compatibility_pack 2007 cpe:2.3:a:microsoft:office_compatibility_pack:2007:sp2:*:*:*:*:*:*
microsoft open_xml_file_format_converter — cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:*

References for CVE-2011-1987

cvelogic Threat Intelligence