Unspecified vulnerability in the AClient agent in Symantec Altiris Deployment Solution 6.9.x before 6.9 SP3 Build 430, when key-based authentication is being used between a deployment server and a client, allows remote attackers to bypass authentication and execute arbitrary commands as SYSTEM by spoofing the deployment server and sending "alternate commands" before the handshake is completed.
Conclusion & alert: CVE-2009-3109 is rated Moderate Risk (56.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.38%). 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 | 2025-03-30 | 0.91% | 0.38% | -0.53% |
| 2 | 2025-03-29 | 0.38% | 0.91% | +0.53% |
| 3 | 2025-03-17 | — | 0.38% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| symantec | altiris_deployment_solution | 6.9 | cpe:2.3:a:symantec:altiris_deployment_solution:6.9:*:*:*:*:*:*:* |
| symantec | altiris_deployment_solution | 6.9 | cpe:2.3:a:symantec:altiris_deployment_solution:6.9:sp1:*:*:*:*:*:* |
| symantec | altiris_deployment_solution | 6.9 | cpe:2.3:a:symantec:altiris_deployment_solution:6.9:sp2:*:*:*:*:*:* |