How severe is CVE-2023-21311?

CVE-2023-21311 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-21311 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-2023-21311?

CVE-2023-21311 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21311?

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

When was CVE-2023-21311 published?

CVE-2023-21311 was published on 2023-10-30 and last updated on 2026-06-17.

CVE-2023-21311

CVE-2023-21311 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 5.5. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Google Android
Published: 2023-10-30
Last modified: 2026-06-17

Description

In Settings, there is a possible way to control private DNS settings from a secondary user due to a permissions bypass. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

Frequently asked questions

What is CVE-2023-21311?: In Settings, there is a possible way to control private DNS settings from a secondary user due to a permissions bypass. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
How severe is CVE-2023-21311?: CVE-2023-21311 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-21311 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-2023-21311?: CVE-2023-21311 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21311?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21311 published?: CVE-2023-21311 was published on 2023-10-30 and last updated on 2026-06-17.

References

https://source.android.com/docs/security/bulletin/android-14

Affected products (1)

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

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