Stack-based buffer overflow in the server in IBM Tivoli Storage Manager FastBack 6.1 before 6.1.12.1 allows remote attackers to execute arbitrary code via a crafted packet, a different vulnerability than CVE-2015-4931, CVE-2015-4932, CVE-2015-4934, and CVE-2015-4935.
Conclusion & alert: CVE-2015-4933 is rated High Risk (68.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.98%, 95th 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 | 23.07% | 8.98% | -14.09% |
| 2 | 2025-12-25 | 18.35% | 23.07% | +4.72% |
| 3 | 2025-06-08 | — | 18.35% | — |
Full EPSS history (15 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 |
|---|---|---|---|
| ibm | tivoli_storage_manager_fastback | 6.1.0.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.0.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.1.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.1.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.7.2 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.7.2:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.8.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.8.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.8.1 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.8.1:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.9.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.9.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.9.1 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.9.1:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.10.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.10.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.10.1 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.10.1:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.11.0 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.11.0:*:*:*:*:*:*:* |
| ibm | tivoli_storage_manager_fastback | 6.1.11.1 | cpe:2.3:a:ibm:tivoli_storage_manager_fastback:6.1.11.1:*:*:*:*:*:*:* |