CVE-2025-21399

Estado: AnalizadaAlta (7.4)—

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.4

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.68%
Percentil entre todas las CVEs puntuadas: 51
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1574.007 Path Interception by PATH Environment Variablestealth · execution80 %
Impacto secundarioT1059 Command and Scripting Interpreterexecution75 %

AV:L sin UI:N indica vulnerabilidad local; CWE-426 (untrusted search path) sugiere suplantación de DLL. Elevación de privilegios en Edge Update permite ejecución con permisos elevados.

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

Execution Prevention Audit Threat Intelligence Program Restrict Web-Based Content Restrict File and Directory Permissions Privileged Account Management

Tecnologías afectadas (1)

Microsoft — Edge Update

CWE

CWE-426

Referencias

JSON original (NVD)

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  "lastModified": "2026-06-17T08:43:16.680",
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