CVE-2022-20084

Local privilege escalation via unchecked broadcast suppression

Published May 3, 2022 · Updated Aug 3, 2024

Missing authorization in MediaTek chipset telephony on Android 10.0 through 12.0 allows local users to disable emergency broadcasts. The telephony component processes a local broadcast-suppression operation without checking the caller's permission; MediaTek has not named the interface or function. A local low-privileged context is required, no user interaction is needed, and the demonstrated consequence is loss of emergency-broadcast reception.

CVSS severity7.8
High
EPSS probability0.10%
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 MediaTek chipset telephony on Android 10.0 through 12.0 allows local users to disable emergency broadcasts. The telephony component processes a local broadcast-suppression operation without checking the caller's permission; MediaTek has not named the interface or function. A local low-privileged context is required, no user interaction is needed, and the demonstrated consequence is loss of emergency-broadcast reception.

The record

CVE
CVE-2022-20084
Published
May 3, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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