Citrix Cloud.com CloudStack, and Apache CloudStack pre-release, allows remote attackers to make arbitrary API calls by leveraging the system user account, as demonstrated by API calls to delete VMs.
Conclusion & alert: CVE-2012-4501 is rated High Risk (77.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 7.77%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.04% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2.73% | 7.77% | +5.04% |
| 2 | 2025-03-30 | 3.10% | 2.73% | -0.37% |
| 3 | 2025-03-29 | — | 3.10% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| apache | cloudstack | — | cpe:2.3:a:apache:cloudstack:-:prerelease:*:*:*:*:*:* |
| citrix | cloudstack | — | cpe:2.3:a:citrix:cloudstack:-:*:*:*:*:*:*:* |