Memory leak in Cisco IOS 12.2 in the Performance Routing Engine (PRE) module on uBR10000 devices allows remote authenticated users to cause a denial of service (memory consumption or PXF process crash) by sending docsIfMCmtsMib SNMP requests quickly, aka Bug ID CSCue65051.
Conclusion & alert: CVE-2015-4204 is rated Moderate Risk (58.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.74%). Core evidence: EPSS rose +2.07% 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 | 0.67% | 2.74% | +2.07% |
| 2 | 2025-05-22 | 0.83% | 0.67% | -0.16% |
| 3 | 2025-03-30 | — | 0.83% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.0 | 6.9 | [email protected] |
| URL | Tags |
|---|---|
| http://tools.cisco.com/security/center/viewAlert.x?alertId=39440 | Vendor Advisory |
| http://www.securityfocus.com/bid/75337 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1032692 | Third Party Advisory VDB Entry |