CVE-2026-20471

{
  "id": "CVE-2026-20471",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-03T03:16:42.060",
  "lastModified": "2026-10-23T22:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10991588 (Note: For MT6880, MT6890, MT6990, MT6988, MT6986, MT6813) / AUTO00851171 (Note: For MT2735, MT2737); Issue ID: MSV-7790."
    },
    {
      "lang": "es",
      "value": "En DA, hay una posible escritura fuera de límites debido a una comprobación de límites faltante. Esto podría llevar a una denegación de servicio local, si un atacante tiene acceso físico al dispositivo, sin necesidad de privilegios de ejecución adicionales. La interacción del usuario no es necesaria para la explotación. ID del parche: ALPS10991588 (Nota: Para MT6880, MT6890, MT6990, MT6988, MT6986, MT6813) / AUTO00851171 (Nota: Para MT2735, MT2737); ID del problema: MSV-7790."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "MediaTek, Inc.",
          "product": "MediaTek chipset",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "MT2735",
              "status": "affected"
            },
            {
              "version": "MT2737",
              "status": "affected"
            },
            {
              "version": "MT6813",
              "status": "affected"
            },
            {
              "version": "MT6880",
              "status": "affected"
            },
            {
              "version": "MT6890",
              "status": "affected"
            },
            {
              "version": "MT6986",
              "status": "affected"
            },
            {
              "version": "MT6988",
              "status": "affected"
            },
            {
              "version": "MT6990",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "attackVector": "PHYSICAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-03T19:04:13.222828Z",
          "id": "CVE-2026-20471",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.mediatek.com/product-security-bulletin/August-2026",
      "source": "[email protected]"
    }
  ]
}