Stack-based buffer overflow in magentservice.exe in the server in HP LoadRunner 11.00 before patch 4 allows remote attackers to execute arbitrary code via a crafted size value in a packet. NOTE: it was originally reported that the affected product is HP Diagnostics Server, but HP states that "the vulnerable product is actually HP LoadRunner."
Conclusion & alert: CVE-2011-4789 is rated High Exploit Risk (84.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 64.80%, 99th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 18423 | exploit_db | edb | 2012-01-27 | Exploit-DB ↗ |
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 | 77.48% | 64.80% | -12.68% |
| 2 | 2026-05-02 | 78.54% | 77.48% | -1.06% |
| 3 | 2026-02-17 | — | 78.54% | — |
Full EPSS history (25 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 |
|---|---|---|---|
| hp | diagnostics | — | cpe:2.3:a:hp:diagnostics:*:*:*:*:*:*:*:* |