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CVE-2025-55581

Estado: AnalizadaAlta (7.3)—

D-Link DCS-825L firmware version 1.08.01 and possibly prior versions contain an insecure implementation in the mydlink-watch-dog.sh script. The script monitors and respawns the `dcp` and `signalc` binaries without validating their integrity, origin, or permissions. An attacker with filesystem access (e.g., via UART or firmware modification) may replace these binaries to achieve persistent arbitrary code execution with root privileges. The issue stems from improper handling of executable trust and absence of integrity checks in the watchdog logic.

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.

Acceso local (AV:L) sin interacción permite reemplazar binarios en watchdog sin validación de integridad, escalando a root. CWE-269 (improper privilege handling) y CWE-494 (download of code without integrity check) confirman escalada. Impactos: ejecución persistente como root (T1068), acceso de cuen

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

Update SoftwareApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

Dlink — Dcs-825l Firmware

CWE

Referencias

JSON original (NVD)

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          "role": "CISA Coordinator",
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          "timestamp": "2025-08-22T18:27:07.147276Z"
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          "integrityImpact": "HIGH",
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          "privilegesRequired": "LOW",
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      "value": "D-Link DCS-825L firmware version 1.08.01 and possibly prior versions contain an insecure implementation in the mydlink-watch-dog.sh script. The script monitors and respawns the `dcp` and `signalc` binaries without validating their integrity, origin, or permissions. An attacker with filesystem access (e.g., via UART or firmware modification) may replace these binaries to achieve persistent arbitrary code execution with root privileges. The issue stems from improper handling of executable trust and absence of integrity checks in the watchdog logic."
    },
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      "value": "La versión de firmware 1.08.01 de la D-Link DCS-825L y posiblemente versiones anteriores contienen una implementación insegura en el script mydlink-watch-dog.sh. Este script monitoriza y regenera los binarios `dcp` y `signalc` sin validar su integridad, origen ni permisos. Un atacante con acceso al sistema de archivos (por ejemplo, mediante UART o modificación del firmware) podría reemplazar estos binarios para ejecutar código arbitrario de forma persistente con privilegios de root. El problema se debe a una gestión incorrecta de la confianza de los ejecutables y a la ausencia de comprobaciones de integridad en la lógica del watchdog."
    }
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  "lastModified": "2026-06-17T09:41:50.647",
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