CVE-2021-0434

Privilege escalation via underspecified Bluetooth consent dialog

Published Dec 15, 2021 · Updated Aug 3, 2024

Improper privilege management in Android 9 through 11 allows physically proximate attackers to acquire Bluetooth permissions. BluetoothPermissionRequest.onReceive presents a consent dialog that omits information needed to identify the requesting Bluetooth device, enabling a malicious device to mislead the user into approving its request. Exploitation requires user interaction and Bluetooth proximity; approval grants the requested permission and can elevate privileges without additional execution privileges.

CVSS severity7.3
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Android 9 through 11 allows physically proximate attackers to acquire Bluetooth permissions. BluetoothPermissionRequest.onReceive presents a consent dialog that omits information needed to identify the requesting Bluetooth device, enabling a malicious device to mislead the user into approving its request. Exploitation requires user interaction and Bluetooth proximity; approval grants the requested permission and can elevate privileges without additional execution privileges.

The record

CVE
CVE-2021-0434
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
T1068
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 15, 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-9

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

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

Published CVSS scores

6.9NIST NVDAV:L/AC:M/Au:N/C:C/I:C/A:C
7.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:R/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.

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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)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation 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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