CVE-2022-20041

Local privilege escalation via missing Bluetooth permission check

Published Feb 9, 2022 · Updated Aug 3, 2024

Improper privilege management in MediaTek Bluetooth on Android 8.1 through 12.0 allows local users to escalate privileges without user interaction. The Bluetooth component omits a required permission check when handling a local request, allowing an unprivileged process to invoke functionality reserved for higher-privileged callers. Exploitation requires local code execution on an affected MediaTek chipset and grants elevated privileges; no additional execution privileges or user interaction are needed.

CVSS severity7.8
High
EPSS probability0.13%
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 MediaTek Bluetooth on Android 8.1 through 12.0 allows local users to escalate privileges without user interaction. The Bluetooth component omits a required permission check when handling a local request, allowing an unprivileged process to invoke functionality reserved for higher-privileged callers. Exploitation requires local code execution on an affected MediaTek chipset and grants elevated privileges; no additional execution privileges or user interaction are needed.

The record

CVE
CVE-2022-20041
Published
Feb 9, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, CWE-269, T1548
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-269Improper Privilege Management
T1548Abuse Elevation Control Mechanism

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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