CVE-2021-0628

Local privilege escalation via improper input validation

Published Aug 18, 2021 · Updated Aug 3, 2024

Memory corruption in MediaTek OMA DRM on Android 10.0 and 11.0 allows local users to escalate privileges through invalid input. The OMA DRM component improperly validates input, but MediaTek has not disclosed the affected parser, function, or memory operation. Exploitation requires System execution privileges on an affected device and no user interaction, with impact limited to local privilege escalation.

CVSS severity6.7
Medium
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

Memory corruption in MediaTek OMA DRM on Android 10.0 and 11.0 allows local users to escalate privileges through invalid input. The OMA DRM component improperly validates input, but MediaTek has not disclosed the affected parser, function, or memory operation. Exploitation requires System execution privileges on an affected device and no user interaction, with impact limited to local privilege escalation.

The record

CVE
CVE-2021-0628
Published
Aug 18, 2021
Updated
Aug 3, 2024
Vendor
MediaTek
Product
OMA DRM
Classifications
CWE-787, CWE-20, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 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 · OMA DRMversion=Android 10.0, 11.0

Published CVSS scores

6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-20Improper Input Validation
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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