CVE-2022-20071

Local privilege escalation via missing certificate validation

Published Apr 11, 2022 · Updated Aug 3, 2024

Improper security checking in MediaTek CCU on Android 11.0 and 12.0 allows local users to escalate privileges without interaction. The CCU component fails to validate a certificate, but MediaTek has not disclosed the certificate's role or the improperly accepted operation. Exploitation requires existing System execution privileges; the resulting elevated privilege level remains undisclosed.

CVSS severity6.7
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper security checking in MediaTek CCU on Android 11.0 and 12.0 allows local users to escalate privileges without interaction. The CCU component fails to validate a certificate, but MediaTek has not disclosed the certificate's role or the improperly accepted operation. Exploitation requires existing System execution privileges; the resulting elevated privilege level remains undisclosed.

The record

CVE
CVE-2022-20071
Published
Apr 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-358, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 11, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-358Improperly Implemented Security Check for Standard
T1068Exploitation for Privilege Escalation

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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