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CVE-2026-32105

Estado: AnalizadaCrítica (9.3)—

xrdp is an open source RDP server. In versions through 0.10.5, xrdp does not implement verification for the Message Authentication Code (MAC) signature of encrypted RDP packets when using the "Classic RDP Security" layer. While the sender correctly generates signatures, the receiving logic lacks the necessary implementation to validate the 8-byte integrity signature, causing it to be silently ignored. An unauthenticated attacker with man-in-the-middle (MITM) capabilities can exploit this missing check to modify encrypted traffic in transit without detection.

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It does not affect connections where the TLS security layer is enforced. This issue has been fixed in version 0.10.6. If users are unable to immediately upgrade, they should configure xrdp.ini to enforce TLS security (security_layer=tls) to ensure end-to-end integrity.

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.

Atacante MITM modifica tráfico RDP encriptado sin validación de MAC (CWE-354). AV:N sin autenticación previa y acceso remoto directo a servicio RDP expuesto justifica T1557. Impacto: manipulación de datos (sesión comprometida) y tráfico de red interceptado.

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

Encrypt Sensitive InformationNetwork SegmentationUser TrainingUser Account ManagementNetwork Intrusion PreventionMulti-factor Authentication

Tecnologías afectadas (1)

Neutrinolabs — Xrdp

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-32105",
  "cveTags": [],
  "metrics": {
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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    }
  ],
  "lastModified": "2026-06-17T10:35:08.690",
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