CVE-2021-0669

Local privilege escalation via freed memory access

Published Nov 18, 2021 · Updated Aug 3, 2024

Use-after-free memory corruption in MediaTek APUSYS on Android 10.0 and 11.0 allows local users to elevate privileges. APUSYS accesses memory after it has been freed, but MediaTek has not identified the affected function, object, or triggering input. Exploitation requires System execution privileges and no user interaction; success grants elevated privileges on an affected MediaTek chipset.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free memory corruption in MediaTek APUSYS on Android 10.0 and 11.0 allows local users to elevate privileges. APUSYS accesses memory after it has been freed, but MediaTek has not identified the affected function, object, or triggering input. Exploitation requires System execution privileges and no user interaction; success grants elevated privileges on an affected MediaTek chipset.

The record

CVE
CVE-2021-0669
Published
Nov 18, 2021
Updated
Aug 3, 2024
Vendor
MediaTek
Product
MediaTek APUSYS
Classifications
CWE-416, T1404
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 18, 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 10.0, 11.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

MediaTek · MediaTek APUSYSversion=Android 10.0, 11.0

Published CVSS scores

No CVSS assessment is available in this record.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1404Exploitation 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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