fastfat.sys (aka the FASTFAT driver) in the kernel-mode drivers in Microsoft Windows Server 2003 SP2, Vista SP2, and Server 2008 SP2 does not properly allocate memory, which allows physically proximate attackers to execute arbitrary code or cause a denial of service (reserved-memory write) by connecting a crafted USB device, aka "Microsoft Windows Disk Partition Driver Elevation of Privilege Vulnerability."
Conclusion & alert: CVE-2014-4115 is rated Moderate Risk (60.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.88%). Core evidence: EPSS rose +2.17% over the last day, indicating growing attacker interest. 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 | 2026-06-15 | 0.71% | 2.88% | +2.17% |
| 2 | 2025-10-22 | 0.83% | 0.71% | -0.12% |
| 3 | 2025-03-30 | — | 0.83% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.2 | 2.0 | HIGH |
|
3.9 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_server_2003 | — | cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:* |
| microsoft | windows_server_2008 | — | cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:*:* |
| microsoft | windows_vista | — | cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:* |