CVE-2026-4434

Estado: AnalizadaAlta (8.1)—

Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 8.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.23%
Percentil entre todas las CVEs puntuadas: 13
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1557 Adversary-in-the-Middlecredential access · collection90 %
Impacto secundarioT1005 Data from Local Systemcollection75 %
Impacto secundarioT1078 Valid Accountsstealth · persistence · privilege escalation · initial access70 %

Vulnerabilidad en validación de certificados TLS en conexiones WinRM remoto (CWE-295), explotable sin autenticación previa desde la red. Permite MITM (T1557) para interceptar credenciales (T1078) y acceder a datos sensibles del PAM (T1005).

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

User Training Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Application Developer Guidance

Tecnologías afectadas (1)

Devolutions — Devolutions Server

CWE

CWE-295

Referencias

https://devolutions.net/security/advisories/DEVO-2026-0005/

JSON original (NVD)

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