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CVE-2025-14321

Estado: ModificadaCrítica (9.8)—

Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

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.

Use-after-free en WebRTC (CWE-416) en navegador expuesto en red sin autenticación (AV:N/PR:N/UI:N) permite ejecución de código remoto con impacto crítico (C:H/I:H/A:H).

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)

Mostrar
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  "published": "2025-12-09T16:17:39.410",
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  "weaknesses": [
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    },
    {
      "lang": "es",
      "value": "Uso después de liberación en el componente de señalización de WebRTC. Esta vulnerabilidad afecta a Firefox menor que 146, Firefox ESR menor que 140.6, Thunderbird menor que 146, y Thunderbird menor que 140.6."
    }
  ],
  "lastModified": "2026-10-05T15:10:00.590",
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