CVE-2025-52691

Estado: AnalizadaCrítica (10)⚠ Explotación activa

Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Puntuación base: 10

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 86%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 3/10/2026

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).

CISA KEV — explotada activamente

Añadida al catálogo: 26/1/2026
Plazo de remediación: 16/2/2026
Uso conocido en ransomware: Known

🎯 Técnicas ATT&CK

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

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access95 %
Impacto principalT1505.003 Web Shellpersistence90 %
Impacto secundarioT1059.001 PowerShellexecution85 %

CVE crítico (CVSS 9.8) sin autenticación; CWE-434 (arbitrary file upload) + AV:N/PR:N permite T1190. Web shell (T1505.003) y ejecución de comandos (T1059.001) son consecuencias directas de RCE mediante upload no autorizado.

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 Management Disable or Remove Feature or Program Vulnerability Scanning User Account Management Network Segmentation Limit Access to Resource Over Network

Tecnologías afectadas (1)

Smartertools — Smartermail

CWE

CWE-434

Referencias

JSON original (NVD)

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  "lastModified": "2026-06-17T09:36:54.733",
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