Use-after-free vulnerability in Microsoft Word 2007 SP3, Word Viewer, and Office Compatibility Pack SP3 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Component Use After Free Vulnerability."
Conclusion & alert: CVE-2015-1651 is rated High Risk (76.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 53.05%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +15.06% 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 | 2025-05-07 | 37.99% | 53.05% | +15.06% |
| 2 | 2025-03-30 | 35.73% | 37.99% | +2.27% |
| 3 | 2025-03-29 | — | 35.73% | — |
Full EPSS history (17 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] |
: <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | office_compatibility_pack | — | cpe:2.3:a:microsoft:office_compatibility_pack:*:sp3:*:*:*:*:*:* |
| microsoft | word | 2007 | cpe:2.3:a:microsoft:word:2007:sp3:*:*:*:*:*:* |
| microsoft | word_viewer | — | cpe:2.3:a:microsoft:word_viewer:*:*:*:*:*:*:*:* |