The Internet Key Exchange version 1 (IKEv1) implementation in Stonesoft StoneGate Firewall before 2.6.1 allows remote attackers to cause a denial of service via certain crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of details in the Stonesoft advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.
Conclusion & alert: CVE-2005-3672 is rated Moderate Risk (52.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.74%, 91th 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 | 2025-08-29 | 6.39% | 6.74% | +0.36% |
| 2 | 2025-03-30 | 6.86% | 6.39% | -0.47% |
| 3 | 2025-03-29 | — | 6.86% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| stonesoft | stonegate_firewall | <= 2.6.0 | cpe:2.3:a:stonesoft:stonegate_firewall:*:*:*:*:*:*:*:* |