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CVE-2016-10398

Status: ModifiedMedium (6.2)—
Severity6.2Medium · CVSS 3.0
Exploitation probability0.22 %higher than 12% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Android 6.0 has an authentication bypass for attackers with root and physical access. Cryptographic authentication tokens (AuthTokens) used by the Trusted Execution Environment (TEE) are protected by a weak challenge. This allows adversaries to replay previously captured responses and use the TEE without authenticating. All apps using authentication-gated cryptography are vulnerable to this attack, which was confirmed on the LG Nexus 5X.

CVSS

Base score
6.2
Version
3.0
Vector
CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.22 %
Percentile among all scored CVEs
12
Score date
10/22/2026

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

Show 2 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2016-10398",
  "cveTags": [],
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
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          "versions": [
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              "status": "affected",
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  "published": "2017-07-17T13:18:05.623",
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  "vulnStatus": "Modified",
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          "value": "CWE-264"
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      "lang": "en",
      "value": "Android 6.0 has an authentication bypass for attackers with root and physical access. Cryptographic authentication tokens (AuthTokens) used by the Trusted Execution Environment (TEE) are protected by a weak challenge. This allows adversaries to replay previously captured responses and use the TEE without authenticating. All apps using authentication-gated cryptography are vulnerable to this attack, which was confirmed on the LG Nexus 5X."
    },
    {
      "lang": "es",
      "value": "Android versión 6.0, presenta un bypass de autenticación para los atacantes con acceso root y físico. Los tokens de autenticación criptográfica (AuthTokens) utilizados por el Entorno de Ejecución de Confianza (TEE) están protegidos por un desafío débil. Esto permite a los adversarios reproducir respuestas capturadas previamente y utilizar el TEE sin autenticar. Todas las aplicaciones que utilizan criptografía con autenticación son vulnerables a este ataque, que se confirmó en el teléfono Nexus 5X de LG."
    }
  ],
  "lastModified": "2026-06-17T00:39:36.063",
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    {
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  "sourceIdentifier": "cve@mitre.org"
}