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; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; Excel Services on Office SharePoint Server 2007 SP2; Excel Services on Office SharePoint Server 2010 Gold and SP1; and Excel Web App 2010 Gold and SP1 do not properly parse conditional expressions associated with formatting requirements, which allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Conditional Expression Parsing Vulnerability."
Conclusion & alert: CVE-2011-1989 is rated High Risk (66.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 21.14%, 97th 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 | 2026-06-24 | 27.77% | 21.14% | -6.63% |
| 2 | 2026-06-15 | 58.77% | 27.77% | -31.00% |
| 3 | 2026-03-17 | — | 58.77% | — |
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: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 | excel_web_app | 2010 | cpe:2.3:a:microsoft:excel_web_app:2010:*:*:*:*:*:*:* |
| microsoft | excel_web_app | 2010 | cpe:2.3:a:microsoft:excel_web_app:2010:sp1:*:*:*:*:*:* |
| 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:*:*:*:*:* |
| microsoft | sharepoint_server | 2007 | cpe:2.3:a:microsoft:sharepoint_server:2007:sp2:x32:*:*:*:*:* |
| microsoft | sharepoint_server | 2007 | cpe:2.3:a:microsoft:sharepoint_server:2007:sp2:x64:*:*:*:*:* |
| microsoft | sharepoint_server | 2010 | cpe:2.3:a:microsoft:sharepoint_server:2010:*:*:*:*:*:*:* |
| microsoft | sharepoint_server | 2010 | cpe:2.3:a:microsoft:sharepoint_server:2010:sp1:*:*:*:*:*:* |