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CVE-2025-3034

Estado: ModificadaAlta (8.1)—

Memory safety bugs present in Firefox 136 and Thunderbird 136. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Aplicación expuesta en red (AV:N) con alto impacto de confidencialidad, integridad y disponibilidad (C:H/I:H/A:H). Memory safety bugs en navegador/cliente de correo remoto sin interacción del usuario (UI:N) permiten ejecución de código arbitrario.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (2)

Mozilla — FirefoxMozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-3034",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "no"
            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2025-04-02T03:55:44.006897Z"
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          "attackComplexity": "HIGH",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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  "published": "2025-04-01T13:15:41.790",
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      "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1894100%2C1934086%2C1950360",
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        "Broken Link",
        "Issue Tracking"
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      "source": "security@mozilla.org"
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      "url": "https://www.mozilla.org/security/advisories/mfsa2025-20/",
      "tags": [
        "Vendor Advisory"
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      "source": "security@mozilla.org"
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      "url": "https://www.mozilla.org/security/advisories/mfsa2025-23/",
      "tags": [
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
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          "value": "CWE-787"
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      "value": "Memory safety bugs present in Firefox 136 and Thunderbird 136. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 137 and Thunderbird 137."
    },
    {
      "lang": "es",
      "value": "Errores de seguridad de memoria presentes en Firefox 136 y Thunderbird 136. Algunos de estos errores mostraron evidencia de corrupción de memoria y presumimos que, con el esfuerzo suficiente, algunos de ellos podrían haberse explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox 137 y Thunderbird 137."
    }
  ],
  "lastModified": "2026-09-30T18:10:00.190",
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