CVE-2006-3677

Status: ModifiedHigh (7.5)—💥 Exploit
Mozilla Firefox 1.5 before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to execute arbitrary code by changing certain properties of the window navigator object (window.navigator) that are accessed when Java starts up, which causes a crash that leads to code execution.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 79%
Percentile among all scored CVEs: 100
Score date: 10/8/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
Metasploit module (reliable, widely available exploit) · Mozilla Suite/Firefox Navigator Object Code Execution
Published on Exploit-DB · Mozilla Suite/Firefox - Navigator Object Code Execution (Metasploit) (9/20/2010)
Published on Exploit-DB · Mozilla Firefox 1.5.0.4 - JavaScript Navigator Object Code Execution (7/28/2006)
Published on Exploit-DB · Mozilla Suite/Firefox < 1.5.0.5 - Navigator Object Code Execution (Metasploit) (7/25/2006)
Affected technologies (2)

Mozilla — Firefox Mozilla — Seamonkey
CWEs

CWE-16
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2006-3677",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": true,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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  "published": "2006-07-27T19:04:00.000",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-16"
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  "descriptions": [
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      "lang": "en",
      "value": "Mozilla Firefox 1.5 before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to execute arbitrary code by changing certain properties of the window navigator object (window.navigator) that are accessed when Java starts up, which causes a crash that leads to code execution."
    },
    {
      "lang": "es",
      "value": "Mozilla Firefox 1.5 anterior a 1.5.0.5 y SeaMonkey anterior a 1.0.3 permite a atacantes remotos ejecutar código de su elección cambiando ciertas propiedades del objeto de la ventana de navegación (window.navigator) que es accedido cuando comienza Java, lo cual provoca un caida que desemboca en una ejecución de código."
    }
  ],
  "lastModified": "2026-06-16T22:27:32.533",
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              "matchCriteriaId": "F2F38886-C25A-4C6B-93E7-36461405BA99"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "09E18FC0-0C8C-4FA1-85B9-B868D00F002F"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:seamonkey:1.0:*:dev:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "55344F76-1C42-4DD8-A28B-1C33626C6FD2"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6521C877-63C9-4B6E-9FC9-1263FFBB7950"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D949DF0A-CBC2-40E1-AE6C-60E6F58D2481"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}