VMware ESXi 4.0 through 5.1 and ESX 4.0 and 4.1 allow remote attackers to cause a denial of service (NULL pointer dereference) by intercepting and modifying Network File Copy (NFC) traffic.
Conclusion & alert: CVE-2014-1207 is rated Moderate Risk (48.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.76%). Core evidence: EPSS rose +1.41% 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 | 1.34% | 2.76% | +1.41% |
| 2 | 2025-12-07 | 2.96% | 1.34% | -1.61% |
| 3 | 2025-06-15 | — | 2.96% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
: Per: http://cwe.mitre.org/data/definitions/476.html "CWE-476: NULL Pointer Dereference"
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| vmware | esxi | 4.0 | cpe:2.3:o:vmware:esxi:4.0:*:*:*:*:*:*:* |
| vmware | esxi | 4.0 | cpe:2.3:o:vmware:esxi:4.0:1:*:*:*:*:*:* |
| vmware | esxi | 4.0 | cpe:2.3:o:vmware:esxi:4.0:2:*:*:*:*:*:* |
| vmware | esxi | 4.0 | cpe:2.3:o:vmware:esxi:4.0:3:*:*:*:*:*:* |
| vmware | esxi | 4.0 | cpe:2.3:o:vmware:esxi:4.0:4:*:*:*:*:*:* |
| vmware | esxi | 4.1 | cpe:2.3:o:vmware:esxi:4.1:*:*:*:*:*:*:* |
| vmware | esxi | 4.1 | cpe:2.3:o:vmware:esxi:4.1:1:*:*:*:*:*:* |
| vmware | esxi | 4.1 | cpe:2.3:o:vmware:esxi:4.1:2:*:*:*:*:*:* |
| vmware | esxi | 5.0 | cpe:2.3:o:vmware:esxi:5.0:*:*:*:*:*:*:* |
| vmware | esxi | 5.0 | cpe:2.3:o:vmware:esxi:5.0:1:*:*:*:*:*:* |
| vmware | esxi | 5.0 | cpe:2.3:o:vmware:esxi:5.0:2:*:*:*:*:*:* |
| vmware | esxi | 5.1 | cpe:2.3:o:vmware:esxi:5.1:*:*:*:*:*:*:* |
| vmware | esx | 4.0 | cpe:2.3:o:vmware:esx:4.0:*:*:*:*:*:*:* |
| vmware | esx | 4.1 | cpe:2.3:o:vmware:esx:4.1:*:*:*:*:*:*:* |