Hyper-V in Microsoft Windows Server 2008 Gold, SP2, and R2 allows guest OS users to cause a denial of service (host OS hang) by sending a crafted encapsulated packet over the VMBus, aka "Hyper-V VMBus Vulnerability."
Conclusion & alert: CVE-2010-3960 is rated Moderate Risk (47/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.48%). Mandatory action: Review affected assets and schedule 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 | 2025-03-30 | 1.76% | 1.48% | -0.28% |
| 2 | 2025-03-29 | 1.48% | 1.76% | +0.28% |
| 3 | 2025-03-19 | — | 1.48% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.9 | 2.0 | MEDIUM |
|
3.9 | 6.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_server_2008 | — | cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:* |
| microsoft | windows_server_2008 | — | cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:* |
| microsoft | windows_server_2008 | r2 | cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:* |