Multiple unspecified format string vulnerabilities in multiple unspecified implementations of Internet Key Exchange version 1 (IKEv1) have multiple unspecified attack vectors and impacts, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of information in the original sources, it is likely that this candidate will be REJECTed once it is known which implementations are actually vulnerable.
Conclusion & alert: CVE-2005-3666 is rated High Risk (73.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.53%). Core evidence: EPSS rose +2.77% over the last day, indicating growing attacker interest. 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 | 0.75% | 3.53% | +2.77% |
| 2 | 2025-08-16 | 0.99% | 0.75% | -0.24% |
| 3 | 2025-07-25 | — | 0.99% | — |
Full EPSS history (15 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 |
|---|---|---|---|
| internet_key_exchange | internet_key_exchange | 1 | cpe:2.3:a:internet_key_exchange:internet_key_exchange:1:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://jvn.jp/niscc/NISCC-273756/index.html | |
| http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/ | |
| http://www.kb.cert.org/vuls/id/226364 | Third Party Advisory US Government Resource |
| http://www.niscc.gov.uk/niscc/docs/br-20051114-01013.html?lang=en | Vendor Advisory |