How severe is CVE-2023-21237?

CVE-2023-21237 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-2023-21237 being actively exploited?

Yes. CVE-2023-21237 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-03-05, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-21237?

CVE-2023-21237 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21237?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-21237 have an EU (EUVD) identifier?

Yes. CVE-2023-21237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-25405. It is also flagged as exploited in the EUVD (since 2024-03-05).

When was CVE-2023-21237 published?

CVE-2023-21237 was published on 2023-06-28 and last updated on 2026-06-17.

CVE-2023-21237

CVE-2023-21237 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 5.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-03-05). The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-03-05)
EU (EUVD) id: EUVD-2023-25405
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-03-05)
Weakness: CWE-200
Affected product: Google Android
Published: 2023-06-28
Last modified: 2026-06-17

Description

In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-251586912

Frequently asked questions

What is CVE-2023-21237?: In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-251586912
How severe is CVE-2023-21237?: CVE-2023-21237 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-2023-21237 being actively exploited?: Yes. CVE-2023-21237 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-03-05, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-21237?: CVE-2023-21237 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21237?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-21237 have an EU (EUVD) identifier?: Yes. CVE-2023-21237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-25405. It is also flagged as exploited in the EUVD (since 2024-03-05).
When was CVE-2023-21237 published?: CVE-2023-21237 was published on 2023-06-28 and last updated on 2026-06-17.

References

Affected products (1)

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

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