Cisco Prime Collaboration Assurance 10.0 allows remote attackers to cause a denial of service (HTTP service outage) via a crafted HTTP request, aka Bug ID CSCum38844.
Conclusion & alert: CVE-2015-4280 is rated Moderate Risk (50.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.36%). Core evidence: EPSS rose +2.10% 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 | 0.26% | 2.36% | +2.10% |
| 2 | 2025-06-04 | 0.62% | 0.26% | -0.35% |
| 3 | 2025-03-17 | — | 0.62% | — |
Full EPSS history (5 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] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | prime_collaboration | 10.0 | cpe:2.3:a:cisco:prime_collaboration:10.0:*:*:*:*:*:*:* |