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CVE-2026-6485

Estado: Pendiente de análisisAlta (8.2)—

UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts.

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) con privilegios altos (PR:H) permite escalada mediante shell embebido en UEFI para eludir Secure Boot (T1211) ejecutando comandos de startup (T1059).

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

Threat Intelligence ProgramExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareRestrict Web-Based Content

Tecnologías afectadas (1)

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

Uefi — BiosAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-6485",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6485",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-10T14:30:08.094399Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.2,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 1.5
      }
    ]
  },
  "affected": [
    {
      "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
      "affectedData": [
        {
          "vendor": "Insyde Software",
          "product": "InsydeH2O",
          "versions": [
            {
              "status": "affected",
              "version": "See in the Solution"
            }
          ],
          "platforms": [
            "x86",
            "ARM"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-09-09T04:19:36.437",
  "references": [
    {
      "url": "https://www.insyde.com/security-pledge/sa-2026004/",
      "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
      "description": [
        {
          "lang": "en",
          "value": "CWE-489"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts."
    }
  ],
  "lastModified": "2026-09-10T15:17:39.427",
  "sourceIdentifier": "8338d8cb-57f7-4252-abc0-96fd13e98d21"
}