The IPv6 implementation on Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) exposes IP services on the "far side of the box," which might allow remote attackers to bypass intended access restrictions via IPv6 packets, aka Bug ID CSCso58622.
Conclusion & alert: CVE-2009-4913 is rated Moderate Risk (48.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.79%). Core evidence: EPSS rose +1.69% 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 | 0.10% | 1.79% | +1.69% |
| 2 | 2026-02-23 | 0.20% | 0.10% | -0.11% |
| 3 | 2023-03-07 | — | 0.20% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |