CVE-2026-12220

Estado: AplazadaAlta (7.3)—

A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod_upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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: 7.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.37%
Percentil entre todas las CVEs puntuadas: 29
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.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement75 %
Impacto principalT1059 Command and Scripting Interpreterexecution70 %

Buffer overflow (CWE-119/121) en servicio remoto de firmware; AV:A/PR:L sugiere red adyacente con autenticación. Permite ejecución de código arbitrario en el dispositivo Yealink.

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

Privileged Account Management Disable or Remove Feature or Program Vulnerability Scanning Threat Intelligence Program Restrict Web-Based Content Network Segmentation

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Yealink — Sip-t46u^AI

CWE

CWE-119, CWE-121

Referencias

JSON original (NVD)

Mostrar

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          "value": "CWE-119"
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          "value": "CWE-121"
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      "value": "A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod_upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it."
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      "lang": "es",
      "value": "Se ha encontrado una vulnerabilidad en Yealink SIP-T46U 108.86.0.118. Esto afecta a la función mod_upgrade.SparePartsUpload del archivo /api/upgrade/accupgradebychunk del componente gestor de carga de fragmentos de firmware. Dicha manipulación del argumento uid conduce a un desbordamiento de búfer basado en pila. El ataque solo puede iniciarse dentro de la red local. El exploit ha sido divulgado al público y puede ser utilizado. El proveedor fue contactado con antelación sobre esta divulgación, pero no respondió de ninguna manera."
    }
  ],
  "lastModified": "2026-07-24T12:10:00.210",
  "sourceIdentifier": "cna@vuldb.com"
}