{"id":"CVE-2016-10398","aliases":["EUVD-2016-1580","GHSA-8r7r-cjv2-6hrp"],"status":"published","title":"Android 6.0 has an authentication bypass for attackers with root and physical access....","description":"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.","severity":{"version":"3.0","score":6.2,"vector":"CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00218,"percentile":0.12343,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-264"],"published":"2017-07-14T17:00:00Z","modified":"2026-06-17T00:39:36Z","products":[{"vendor":"google","product":"android"}],"references":[{"url":"https://homepages.staff.os3.nl/~delaat/rp/2015-2016/p30/report.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-10398"},{"url":"https://github.com/advisories/GHSA-8r7r-cjv2-6hrp"}],"sources":{"cve":[{"id":"CVE-2016-10398","description":"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.","status":"published","published":"2017-07-14T17:00:00Z","modified":"2024-08-06T03:21:51.428Z","updated_at":"2026-11-02T14:33:31.450804Z"}],"euvd":[{"id":"EUVD-2016-1580","description":"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.","status":"published","published":"2017-07-14T17:00:00Z","modified":"2024-08-06T03:21:51Z","updated_at":"2026-11-03T02:22:23.66215Z"}],"ghsa":[{"id":"GHSA-8r7r-cjv2-6hrp","title":"Android 6.0 has an authentication bypass for attackers with root and physical access....","description":"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.","status":"published","published":"2022-05-17T02:27:15Z","modified":"2023-01-27T05:05:10Z","cvss":[{"version":"3.0","score":6.2,"vector":"CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T14:42:38.42731Z"}],"nvd":[{"id":"CVE-2016-10398","description":"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.","status":"published","published":"2017-07-17T13:18:05.623Z","modified":"2026-06-17T00:39:36.063Z","cvss":[{"version":"3.0","score":6.2,"vector":"CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:03:38.290327Z"}]}}