CVE-2026-40003

{
  "id": "CVE-2026-40003",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-07T02:16:03.453",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the stack, hijacking the execution flow, bypassing the Secure Boot signature verification mechanism, and achieving unauthorized code execution."
    },
    {
      "lang": "es",
      "value": "El BootROM de ZTE ZX297520V3 contiene una vulnerabilidad que permite escrituras de memoria arbitrarias a través de USB. Los atacantes pueden explotar la falta de validación de la dirección de destino en el modo de descarga USB para escribir datos en cualquier ubicación de la memoria de tiempo de ejecución del BootROM, sobrescribiendo así la pila, secuestrando el flujo de ejecución, eludiendo el mecanismo de verificación de firma de Secure Boot y logrando la ejecución de código no autorizada."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "ZTE",
          "product": "ZX297520V3 BootROM",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7520V3 chip",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
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        "source": "[email protected]",
        "type": "Secondary",
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          "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "PHYSICAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 0.4,
        "impactScore": 4.7
      },
      {
        "source": "[email protected]",
        "type": "Primary",
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          "baseSeverity": "MEDIUM",
          "attackVector": "PHYSICAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 5.9
      }
    ],
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-07T13:04:46.979027Z",
          "id": "CVE-2026-40003",
          "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"
        }
      ]
    }
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  "references": [
    {
      "url": "https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}