The USB driver in Cisco Firepower Extensible Operating System 1.1(1.160) on Firepower 9000 devices allows physically proximate attackers to cause a denial of service via a crafted USB device that triggers invalid USB commands, aka Bug ID CSCux10531.
Conclusion & alert: CVE-2015-6369 is rated Low Risk (27.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.31%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
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 | 0.10% | 0.31% | +0.21% |
| 2 | 2025-03-17 | 0.04% | 0.10% | +0.05% |
| 3 | 2023-03-07 | — | 0.04% | — |
Full EPSS history (4 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 |
|---|---|---|---|
| cisco | firepower_extensible_operating_system | 1.1\(1.160\) | cpe:2.3:o:cisco:firepower_extensible_operating_system:1.1\(1.160\):*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151116-fire | Vendor Advisory |