CVE-2023-21237
MediumExploitedPublic exploitIn applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI.
Published Jun 28, 2023 · Updated Oct 14, 2026 · Also known as A-251586912, PUB-A-251586912
Key Facts
Patch immediately- CVE-2023-21237 is a medium-severity vulnerability (CVSS 6.2 v3.1) affecting Android (Google), platform/frameworks/base (android).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 13, 2023. Public exploit code is available.
- EPSS estimates a 0.3% probability of exploitation in the next 30 days.
- Fixed versions are available, including platform/frameworks/base 13-next:2023-06-01, platform/frameworks/base 13:2023-06-01.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
0.3%
Higher than 17.2% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-21237 brief as a PDF
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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
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 5, 2024 | Mar 26, 2024 | Not reported |
| Industry KEV feed | Jun 13, 2023 | Mar 26, 2024 | Not reported |
| CIRCL KEV | Mar 5, 2024 | Mar 26, 2024 | Not reported |
| ENISA EUVD | Mar 5, 2024 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AndroidGoogle | 13.0, >= Android-13 | n/a |
| platform/frameworks/baseandroid | >= 13-next:0 | 13-next:2023-06-01 |
Patched Releases
platform/frameworks/base
13-next:2023-06-01, 13:2023-06-01
Timeline
Added to Industry KEV feed
Jun 13, 2023
Publicly disclosed
Jun 28, 2023
Added to CISA KEV
Mar 5, 2024
Added to CIRCL KEV
Mar 5, 2024
Added to ENISA EUVD
Mar 5, 2024
Last updated
Oct 14, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
FAQ
Common Questions.
In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI.
Affected: Android (Google) versions 13.0, >= Android-13; platform/frameworks/base (android) versions >= 13-next:0. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 13, 2023.
Yes. It was added on Mar 5, 2024 with a federal remediation due date of Mar 26, 2024.
Public exploit code is available.
Fixed versions are available, including platform/frameworks/base 13-next:2023-06-01, platform/frameworks/base 13:2023-06-01.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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