Stack-based buffer overflow in Pragma FortressSSH 4.0.7.20 allows remote attackers to execute arbitrary code via long SSH_MSG_KEXINIT messages, which may cause an overflow when being logged. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
Conclusion & alert: CVE-2006-2421 is rated Moderate Risk (59.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.31%). 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 | 3.71% | 3.31% | -0.40% |
| 2 | 2025-03-29 | 3.31% | 3.71% | +0.40% |
| 3 | 2025-03-17 | — | 3.31% | — |
Full EPSS history (6 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 |
|---|---|---|---|
| pragma_systems | fortressssh | <= 4.0.7.20 | cpe:2.3:a:pragma_systems:fortressssh:*:*:*:*:*:*:*:* |