LIBSNDFILE.DLL, as used by AOL Nullsoft Winamp 5.33 and possibly other products, allows remote attackers to execute arbitrary code via a crafted .MAT file that contains a value that is used as an offset, which triggers memory corruption.
Conclusion & alert: CVE-2007-1921 is rated Moderate Risk (63.8/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.58%, 90th 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 | 2026-06-15 | 15.10% | 4.58% | -10.52% |
| 2 | 2025-11-27 | 12.88% | 15.10% | +2.22% |
| 3 | 2025-06-13 | — | 12.88% | — |
Full EPSS history (19 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] |
: To exploit this issue, an attacker must entice an unsuspecting user to use the affected application to open a specially crafted file.