CVE-2023-21260

Notification access via overflowing service label

Published Jul 13, 2023 · Updated Oct 30, 2024

UI spoofing in the Packages component of Google Android 11, 12, 12L, and 13 allows attackers to obtain notification access via a malicious app. A malicious app supplies an excessively long service label that overruns the notification-access permission dialog and displays attacker-controlled text as a system message. Exploitation requires the user to confirm the deceptive prompt, after which the app receives notification-listener privileges.

CVSS severity5.5
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI spoofing in the Packages component of Google Android 11, 12, 12L, and 13 allows attackers to obtain notification access via a malicious app. A malicious app supplies an excessively long service label that overruns the notification-access permission dialog and displays attacker-controlled text as a system message. Exploitation requires the user to confirm the deceptive prompt, after which the app receives notification-listener privileges.

The record

CVE
CVE-2023-21260
Published
Jul 13, 2023
Updated
Oct 30, 2024
Vendor
Google
Product
Android
Classifications
CWE-346, T1036
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13, 12L, 12, 11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google · Androidversion=13, 12L, 12, 11

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
T1036Masquerading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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