How severe is CVE-2023-21091?

CVE-2023-21091 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 none, integrity none, and availability high.

Is CVE-2023-21091 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-2023-21091?

CVE-2023-21091 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21091?

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

When was CVE-2023-21091 published?

CVE-2023-21091 was published on 2023-04-19 and last updated on 2026-06-17.

CVE-2023-21091

CVE-2023-21091 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-862.

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-862
Affected product: Google Android
Published: 2023-04-19
Last modified: 2026-06-17

Description

In canDisplayLocalUi of AppLocalePickerActivity.java, there is a possible way to change system app locales due to a missing permission check. This could lead to local denial of service across user boundaries with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-257954050

Frequently asked questions

What is CVE-2023-21091?: In canDisplayLocalUi of AppLocalePickerActivity.java, there is a possible way to change system app locales due to a missing permission check. This could lead to local denial of service across user boundaries with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-257954050
How severe is CVE-2023-21091?: CVE-2023-21091 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 none, integrity none, and availability high.
Is CVE-2023-21091 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-2023-21091?: CVE-2023-21091 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21091 published?: CVE-2023-21091 was published on 2023-04-19 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/2023-04-01

Affected products (1)

cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*

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