Microsoft PowerPoint 2002 SP3, 2003 SP3, 2007 SP2, and 2010; Office 2004, 2008, and 2011 for Mac; Open XML File Format Converter for Mac; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; PowerPoint Viewer; PowerPoint Viewer 2007 SP2; and PowerPoint Web App do not properly validate PersistDirectoryEntry records in PowerPoint documents, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a Slide with a malformed record, which triggers an exception and later use of an unspecified method, aka "Persist Directory RCE Vulnerability."
Conclusion & alert: CVE-2011-0656 is rated High Risk (73.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 59.54%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.78% over the last day, indicating growing attacker interest. 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 | 2025-10-13 | 57.76% | 59.54% | +1.78% |
| 2 | 2025-03-30 | 64.53% | 57.76% | -6.77% |
| 3 | 2025-03-29 | — | 64.53% | — |
Full EPSS history (16 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 | office | 2004 | cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:* |
| microsoft | office | 2008 | cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:* |
| 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 | office_powerpoint_viewer | — | cpe:2.3:a:microsoft:office_powerpoint_viewer:*:*:*:*:*:*:*:* |
| microsoft | open_xml_file_format_converter | — | cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:* |
| microsoft | powerpoint | 2002 | cpe:2.3:a:microsoft:powerpoint:2002:sp3:*:*:*:*:*:* |
| microsoft | powerpoint | 2003 | cpe:2.3:a:microsoft:powerpoint:2003:sp3:*:*:*:*:*:* |
| microsoft | powerpoint | 2007 | cpe:2.3:a:microsoft:powerpoint:2007:sp2:*:*:*:*:*:* |
| microsoft | powerpoint | 2010 | cpe:2.3:a:microsoft:powerpoint:2010:*:*:*:*:*:*:* |
| microsoft | powerpoint_viewer | 2007 | cpe:2.3:a:microsoft:powerpoint_viewer:2007:sp2:*:*:*:*:*:* |
| microsoft | powerpoint_web_app | — | cpe:2.3:a:microsoft:powerpoint_web_app:*:*:*:*:*:*:*:* |