Unspecified vulnerability in Server Message Block Version 2 (SMBv2) signing support in Microsoft Windows Vista allows remote attackers to force signature re-computation and execute arbitrary code via a crafted SMBv2 packet, aka "SMBv2 Signing Vulnerability."
Conclusion & alert: CVE-2007-5351 is rated High Risk (71.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 52.40%, 98th 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 | 2026-04-08 | 55.53% | 52.40% | -3.13% |
| 2 | 2026-03-25 | 53.84% | 55.53% | +1.68% |
| 3 | 2026-03-02 | — | 53.84% | — |
Full EPSS history (20 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:gold:*:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:gold:x64:*:*:*:*:* |