CVE-2026-26154

Estado: AnalizadaAlta (7.5)—

Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.23%
Percentil entre todas las CVEs puntuadas: 68
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 principalT1565.002 Transmitted Data Manipulationimpact75 %

Vector CVSS AV:N/AC:L/PR:N/UI:N indica explotación remota sin autenticación (T1190). CWE-20 (validación de entrada) en WSUS permite manipulación de datos en tránsito sobre la red; impacto primario es T1565.002 (tampering con actualizaciones de software).

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

Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Encrypt Sensitive Information

Tecnologías afectadas (6)

Microsoft — Windows Server 2012 Microsoft — Windows Server 2016 Microsoft — Windows Server 2019 Microsoft — Windows Server 2022 Microsoft — Windows Server 2022 23h2 Microsoft — Windows Server 2025

CWE

CWE-20

Referencias

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26154

JSON original (NVD)

Mostrar

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