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CVE-2021-40026

Status: ModifiedHigh (7.5)—

There is a Heap-based buffer overflow vulnerability in the AOD module in smartphones. Successful exploitation of this vulnerability may affect service integrity.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Huawei — EmuiHuawei — HarmonyosHuawei — Magic UI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-40026",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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  "affected": [
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      "source": "psirt@huawei.com",
      "affectedData": [
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          "vendor": "Huawei",
          "product": "EMUI",
          "versions": [
            {
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              "version": "12.0.0"
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              "version": "11.0.0"
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          "product": "Magic UI",
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              "status": "affected",
              "version": "4.0.0"
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        {
          "vendor": "Huawei",
          "product": "HarmonyOS",
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              "status": "affected",
              "version": "2.0"
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  "published": "2022-01-10T14:10:21.760",
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      "url": "https://consumer.huawei.com/en/support/bulletin/2022/1/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@huawei.com"
    },
    {
      "url": "https://device.harmonyos.com/en/docs/security/update/security-bulletins-202201-0000001238736331",
      "tags": [
        "Vendor Advisory"
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      "source": "psirt@huawei.com"
    },
    {
      "url": "https://consumer.huawei.com/en/support/bulletin/2022/1/",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://device.harmonyos.com/en/docs/security/update/security-bulletins-202201-0000001238736331",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "There is a Heap-based buffer overflow vulnerability in the AOD module in smartphones. Successful exploitation of this vulnerability may affect service integrity."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de desbordamiento de búfer en la región Heap de la memoria en el módulo AOD de los smartphones. Una explotación con éxito de esta vulnerabilidad puede afectar la integridad del servicio"
    }
  ],
  "lastModified": "2026-06-17T04:06:24.923",
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}