Multiple unspecified vulnerabilities in Fenrir Inc. ActiveGeckoBrowser 1.0.0 and 1.0.5 alpha, a module for the Sleipnir web browser, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors related to the Gecko engine.
Conclusion & alert: CVE-2010-2420 is rated Moderate Risk (55.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.13%). 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 | 1.31% | 2.13% | +0.82% |
| 2 | 2025-03-30 | 1.55% | 1.31% | -0.23% |
| 3 | 2025-03-29 | — | 1.55% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| fenrir-inc | activegeckobrowser | 1.0.0 | cpe:2.3:a:fenrir-inc:activegeckobrowser:1.0.0:*:*:*:*:*:*:* |
| fenrir-inc | activegeckobrowser | 1.0.5 | cpe:2.3:a:fenrir-inc:activegeckobrowser:1.0.5:alpha:*:*:*:*:*:* |