Heap-based buffer overflow in the RPC subsystem in Symantec Backup Exec for Windows Servers 10.0, 10d, and 11d allows remote attackers to cause a denial of service (process exit) and possibly execute arbitrary code via crafted ncacn_ip_tcp requests.
Conclusion & alert: CVE-2007-3509 is rated Moderate Risk (57.6/100): CVSS High severity, with high exploitation likelihood (EPSS 6.94%, 93th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 27.23% | 6.94% | -20.29% |
| 2 | 2026-02-28 | 26.49% | 27.23% | +0.74% |
| 3 | 2025-09-26 | — | 26.49% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| symantec | veritas_backup_exec | 10.0 | cpe:2.3:a:symantec:veritas_backup_exec:10.0:*:*:*:*:*:*:* |
| symantec | veritas_backup_exec | 10d | cpe:2.3:a:symantec:veritas_backup_exec:10d:*:*:*:*:*:*:* |
| symantec | veritas_backup_exec | 11d | cpe:2.3:a:symantec:veritas_backup_exec:11d:*:*:*:*:*:*:* |