Stack-based buffer overflow in cstore.exe in the Media Application Server (MAS) in Avaya Aura Application Server 5300 (formerly Nortel Media Application Server) 1.x before 1.0.2 and 2.0 before Patch Bundle 10 allows remote attackers to execute arbitrary code via a crafted cs_anams parameter in a CONTENT_STORE_ADMIN_REQ packet.
Conclusion & alert: CVE-2011-5096 is rated High Risk (66.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.94%). 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 | 8.26% | 3.94% | -4.32% |
| 2 | 2026-05-25 | 9.61% | 8.26% | -1.34% |
| 3 | 2026-03-04 | — | 9.61% | — |
Full EPSS history (17 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 |
|---|---|---|---|
| avaya | aura_application_server_5300 | 1.0 | cpe:2.3:a:avaya:aura_application_server_5300:1.0:*:*:*:*:*:*:* |
| avaya | aura_application_server_5300 | 2.0 | cpe:2.3:a:avaya:aura_application_server_5300:2.0:*:*:*:*:*:*:* |