How severe is CVE-2023-21399?

CVE-2023-21399 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-21399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21399?

CVE-2023-21399 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-21399 published?

CVE-2023-21399 was published on 2023-07-13 and last updated on 2026-06-17.

CVE-2023-21399

CVE-2023-21399 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.8. 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-327.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Google Android
Published: 2023-07-13
Last modified: 2026-06-17

Description

there is a possible way to bypass cryptographic assurances due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Frequently asked questions

What is CVE-2023-21399?: there is a possible way to bypass cryptographic assurances due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
How severe is CVE-2023-21399?: CVE-2023-21399 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-21399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21399?: CVE-2023-21399 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-21399 published?: CVE-2023-21399 was published on 2023-07-13 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/pixel/2023-07-01

Affected products (1)

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

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