CVE-2021-0480

Local identifier disclosure via untargeted snoozing alarm

Published Jun 11, 2021 · Updated Aug 3, 2024

Information disclosure in Android 8.1, 9, 10, and 11 allows local users to obtain a notification identifier through a broadcast intent. The createPendingIntent method in SnoozeHelper.java builds the snoozing alarm as an untargeted broadcast while embedding the notification key as an extra. A local malicious app must induce user interaction and receive that broadcast to read the key; no integrity or availability effect is reported.

CVSS severity5.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Android 8.1, 9, 10, and 11 allows local users to obtain a notification identifier through a broadcast intent. The createPendingIntent method in SnoozeHelper.java builds the snoozing alarm as an untargeted broadcast while embedding the notification key as an extra. A local malicious app must induce user interaction and receive that broadcast to read the key; no integrity or availability effect is reported.

The record

CVE
CVE-2021-0480
Published
Jun 11, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=Android-10 Android-11 Android-8.1 Android-9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-10 Android-11 Android-8.1 Android-9

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 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

No sourced classifications are available.

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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