CVE-2021-0328

Local privilege escalation via unchecked batch scan delivery

Published Feb 10, 2021 · Updated Aug 3, 2024

Missing authorization in Android 8.1, 9, 10, and 11 allows local users to retrieve Bluetooth batch scan results without permission. GattService.java's onBatchScanReports and deliverBatchScan paths forwarded every result to callbacks and pending intents without applying the regular-scan permission filter. A locally installed application needs no additional execution privileges or user interaction; exposure is limited to nearby Bluetooth scan data.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Android 8.1, 9, 10, and 11 allows local users to retrieve Bluetooth batch scan results without permission. GattService.java's onBatchScanReports and deliverBatchScan paths forwarded every result to callbacks and pending intents without applying the regular-scan permission filter. A locally installed application needs no additional execution privileges or user interaction; exposure is limited to nearby Bluetooth scan data.

The record

CVE
CVE-2021-0328
Published
Feb 10, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-862, T1404
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 10, 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 privilegesUnavailable in this record.

What is affected?

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

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1404Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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