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CVE-2026-20529

Estado: Pendiente de análisisMedia (6.7)—

In battery, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11276677; Issue ID: MSV-9217.

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.

Out-of-bounds write (CWE-787) con acceso local (AV:L) y privilegios elevados (PR:H) permite escalada local. El texto indica ejecución de código malicioso tras obtener privilegios del sistema.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-20529",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20529",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-05T00:00:00+00:00"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mediatek.com",
      "affectedData": [
        {
          "vendor": "MediaTek, Inc.",
          "product": "MediaTek chipset",
          "versions": [
            {
              "status": "affected",
              "version": "MT6761"
            },
            {
              "status": "affected",
              "version": "MT6765"
            },
            {
              "status": "affected",
              "version": "MT6768"
            },
            {
              "status": "affected",
              "version": "MT6781"
            },
            {
              "status": "affected",
              "version": "MT6853"
            },
            {
              "status": "affected",
              "version": "MT6858"
            },
            {
              "status": "affected",
              "version": "MT6881"
            },
            {
              "status": "affected",
              "version": "MT6893"
            },
            {
              "status": "affected",
              "version": "MT6989"
            },
            {
              "status": "affected",
              "version": "MT6991"
            },
            {
              "status": "affected",
              "version": "MT6993"
            },
            {
              "status": "affected",
              "version": "MT8171"
            },
            {
              "status": "affected",
              "version": "MT8186"
            },
            {
              "status": "affected",
              "version": "MT8188"
            },
            {
              "status": "affected",
              "version": "MT8189"
            },
            {
              "status": "affected",
              "version": "MT8196"
            },
            {
              "status": "affected",
              "version": "MT8766"
            },
            {
              "status": "affected",
              "version": "MT8768"
            },
            {
              "status": "affected",
              "version": "MT8775"
            },
            {
              "status": "affected",
              "version": "MT8781"
            },
            {
              "status": "affected",
              "version": "MT8788E"
            },
            {
              "status": "affected",
              "version": "MT8791T"
            },
            {
              "status": "affected",
              "version": "MT8792"
            },
            {
              "status": "affected",
              "version": "MT8796"
            },
            {
              "status": "affected",
              "version": "MT8799"
            },
            {
              "status": "affected",
              "version": "MT8883"
            },
            {
              "status": "affected",
              "version": "MT8893"
            },
            {
              "status": "affected",
              "version": "MT8910"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-05T02:16:51.640",
  "references": [
    {
      "url": "https://www.mediatek.com/product-security-bulletin/October-2026",
      "source": "security@mediatek.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@mediatek.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In battery, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11276677; Issue ID: MSV-9217."
    }
  ],
  "lastModified": "2026-10-06T15:05:34.080",
  "sourceIdentifier": "security@mediatek.com"
}