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CVE-2026-6484

Estado: Pendiente de análisisAlta (8.2)—

In an UEFI, Lack of verified boot to certain FV may cause arbitrary code execution.

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.

AV:L PR:H sin UI indican escalada local; la ejecución arbitraria de código en UEFI mediante falta de verified boot es consecuencia de elevación de privilegios a nivel firmware.

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 PreventionPrivileged Account ManagementAuditUpdate SoftwareUser Account ManagementThreat Intelligence Program

Tecnologías afectadas (1)

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

IBM — UefiAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-6484",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6484",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-12T12:39:19.055017Z"
        }
      }
    ],
    "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": "unknown",
              "version": "See in the Solution"
            }
          ],
          "platforms": [
            "x86"
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2026-08-12T01:17:08.060",
  "references": [
    {
      "url": "https://www.insyde.com/security-pledge/sa-2026003/",
      "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "8338d8cb-57f7-4252-abc0-96fd13e98d21",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1277"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In an UEFI, Lack of verified boot to certain FV may cause arbitrary code execution."
    }
  ],
  "lastModified": "2026-08-31T19:27:23.020",
  "sourceIdentifier": "8338d8cb-57f7-4252-abc0-96fd13e98d21"
}