How severe is CVE-2016-10398?

CVE-2016-10398 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-10398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-10398?

CVE-2016-10398 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-10398?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-10398 published?

CVE-2016-10398 was published on 2017-07-17 and last updated on 2026-06-17.

CVE-2016-10398

CVE-2016-10398 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 7.2
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Google Android
Published: 2017-07-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2016-10398?: 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.
How severe is CVE-2016-10398?: CVE-2016-10398 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over physical access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-10398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-10398?: CVE-2016-10398 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-10398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-10398 published?: CVE-2016-10398 was published on 2017-07-17 and last updated on 2026-06-17.

References

https://homepages.staff.os3.nl/~delaat/rp/2015-2016/p30/report.pdf

Affected products (1)

cpe:2.3:o:google:android:6.0:*:*:*:*:*:*:*

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