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CVE-2021-25500

Status: ModifiedMedium (4.4)—

A missing input validation in HDCP LDFW prior to SMR Nov-2021 Release 1 allows attackers to overwrite TZASC allowing TEE compromise.

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 (1)

Google — Android

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-25500",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/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": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
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      "affectedData": [
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          "vendor": "Samsung Mobile",
          "product": "Samsung Mobile Devices",
          "versions": [
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              "status": "affected",
              "version": "Select Q(10.0), R(11.0) devices with Exynos 980, 9820, 9830, 2100 chipset",
              "lessThan": "SMR Nov-2021 Release 1",
              "versionType": "custom"
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  "published": "2021-11-05T03:15:07.323",
  "references": [
    {
      "url": "https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=11",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "mobile.security@samsung.com"
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    {
      "url": "https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=11",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "mobile.security@samsung.com",
      "description": [
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          "value": "CWE-20"
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A missing input validation in HDCP LDFW prior to SMR Nov-2021 Release 1 allows attackers to overwrite TZASC allowing TEE compromise."
    },
    {
      "lang": "es",
      "value": "Una falta de comprobación de entradas en HDCP LDFW versiones anteriores a 1 de SMR Nov-2021, permite a atacantes sobrescribir TZASC, lo que permite comprometer el TEE"
    }
  ],
  "lastModified": "2026-06-17T03:42:11.953",
  "configurations": [
    {
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}