Unspecified vulnerability in Symantec Norton AntiVirus 2005 through 2008; Norton Internet Security 2005 through 2008; AntiVirus Corporate Edition 9.0 before MR7, 10.0, 10.1 before MR8, and 10.2 before MR3; and Client Security 2.0 before MR7, 3.0, and 3.1 before MR8; when Internet Email Scanning is installed and enabled, allows remote attackers to cause a denial of service (CPU consumption and persistent connection loss) via unknown attack vectors.
Conclusion & alert: CVE-2009-3104 is rated Moderate Risk (45.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.20%). Mandatory action: Review affected assets and schedule 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 | 1.59% | 2.20% | +0.61% |
| 2 | 2025-03-30 | 1.78% | 1.59% | -0.19% |
| 3 | 2025-03-29 | — | 1.78% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| symantec | antivirus | 9.0 | cpe:2.3:a:symantec:antivirus:9.0:*:corporate:*:*:*:*:* |
| symantec | antivirus | 9.0 | cpe:2.3:a:symantec:antivirus:9.0:mr6:corporate:*:*:*:*:* |
| symantec | antivirus | 10.0 | cpe:2.3:a:symantec:antivirus:10.0:*:corporate:*:*:*:*:* |
| symantec | antivirus | 10.0 | cpe:2.3:a:symantec:antivirus:10.0:mr1:corporate:*:*:*:*:* |
| symantec | antivirus | 10.0 | cpe:2.3:a:symantec:antivirus:10.0:mr2:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:*:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:mp1:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:mr4:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:mr5:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:mr6:corporate:*:*:*:*:* |
| symantec | antivirus | 10.1 | cpe:2.3:a:symantec:antivirus:10.1:mr7:corporate:*:*:*:*:* |
| symantec | antivirus | 10.2 | cpe:2.3:a:symantec:antivirus:10.2:*:corporate:*:*:*:*:* |
| symantec | antivirus | 10.2 | cpe:2.3:a:symantec:antivirus:10.2:mr2:corporate:*:*:*:*:* |
| symantec | client_security | 2.0 | cpe:2.3:a:symantec:client_security:2.0:*:*:*:*:*:*:* |
| symantec | client_security | 2.0 | cpe:2.3:a:symantec:client_security:2.0:mr6:*:*:*:*:*:* |
| symantec | client_security | 3.0 | cpe:2.3:a:symantec:client_security:3.0:*:*:*:*:*:*:* |
| symantec | client_security | 3.0 | cpe:2.3:a:symantec:client_security:3.0:mr1:*:*:*:*:*:* |
| symantec | client_security | 3.0 | cpe:2.3:a:symantec:client_security:3.0:mr2:*:*:*:*:*:* |
| symantec | client_security | 3.1 | cpe:2.3:a:symantec:client_security:3.1:*:*:*:*:*:*:* |
| symantec | client_security | 3.1 | cpe:2.3:a:symantec:client_security:3.1:mr4:*:*:*:*:*:* |
| symantec | client_security | 3.1 | cpe:2.3:a:symantec:client_security:3.1:mr5:*:*:*:*:*:* |
| symantec | client_security | 3.1 | cpe:2.3:a:symantec:client_security:3.1:mr6:*:*:*:*:*:* |
| symantec | client_security | 3.1 | cpe:2.3:a:symantec:client_security:3.1:mr7:*:*:*:*:*:* |
| symantec | norton_antivirus | 2005 | cpe:2.3:a:symantec:norton_antivirus:2005:*:*:*:*:*:*:* |
| symantec | norton_antivirus | 2006 | cpe:2.3:a:symantec:norton_antivirus:2006:*:*:*:*:*:*:* |
| symantec | norton_antivirus | 2007 | cpe:2.3:a:symantec:norton_antivirus:2007:*:*:*:*:*:*:* |
| symantec | norton_antivirus | 2008 | cpe:2.3:a:symantec:norton_antivirus:2008:*:*:*:*:*:*:* |
| symantec | norton_internet_security | 2005 | cpe:2.3:a:symantec:norton_internet_security:2005:*:*:*:*:*:*:* |
| symantec | norton_internet_security | 2006 | cpe:2.3:a:symantec:norton_internet_security:2006:*:*:*:*:*:*:* |
| symantec | norton_internet_security | 2007 | cpe:2.3:a:symantec:norton_internet_security:2007:*:*:*:*:*:*:* |
| symantec | norton_internet_security | 2008 | cpe:2.3:a:symantec:norton_internet_security:2008:*:*:*:*:*:*:* |