CVE-2023-21237Known exploitation

Local information disclosure via hidden service notifications

Published Jun 28, 2023 · Updated Oct 21, 2025

Information disclosure in Android 13 Framework allows local users to conceal foreground-service notifications without user interaction. NotificationContentInflater.applyRemoteView accepts a crafted RemoteViews presentation that supplies misleading or insufficient UI, allowing the foreground-service notification to remain hidden. No additional execution privileges are required, and the reported impact is confidentiality loss without integrity or availability effects.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Android 13 Framework allows local users to conceal foreground-service notifications without user interaction. NotificationContentInflater.applyRemoteView accepts a crafted RemoteViews presentation that supplies misleading or insufficient UI, allowing the foreground-service notification to remain hidden. No additional execution privileges are required, and the reported impact is confidentiality loss without integrity or availability effects.

The record

CVE
CVE-2023-21237
Published
Jun 28, 2023
Updated
Oct 21, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-200, T1564
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-13
Google · Androidversion=13.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1564Hide Artifacts

Public exploit references

No public exploit references are available in this record.

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Reported exploitation

Technologies

Your stack

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Your stack

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