CVE-2026-45700

Estado: ModificadaAlta (7.7)—

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 7.7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.78%
Percentil entre todas las CVEs puntuadas: 54
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.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %

RDP requiere interacción del usuario (UI:P) para abrir conexión preparada. Out-of-bounds write en decodificador bitmap permite ejecución de código arbitrario en el cliente FreeRDP.

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

Restrict Web-Based Content Privileged Account Management Limit Software Installation Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program

Tecnologías afectadas (1)

Freerdp — Freerdp

CWE

CWE-787
CWE-787

Referencias

JSON original (NVD)

Mostrar

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      "value": "FreeRDP es una implementación gratuita del Protocolo de Escritorio Remoto. Antes de la versión 3.26.0, el decodificador de mapas de bits planares de FreeRDP tiene una escritura fuera de límites en el heap al decodificar datos planares RLE. En libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() valida la coordenada de destino X nXDst contra el paso de destino proporcionado por el llamador (nDstStep) incluso cuando está escribiendo en el búfer temporal interno pTempData. Un atacante puede omitir la verificación con un nDstStep grande y un nXDst grande, lo que hace que planar_decompress_plane_rle() escriba más allá del final de pTempData. Esta vulnerabilidad se corrigió en la versión 3.26.0."
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  ],
  "lastModified": "2026-07-29T13:18:47.550",
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