CVE-2021-0627

Local privilege escalation via integer-overflow memory corruption

Published Aug 18, 2021 · Updated Aug 3, 2024

Integer overflow in MediaTek OMA DRM on Android 10.0 and 11.0 allows local users with System privileges to trigger memory corruption. MediaTek identifies OMA DRM as the affected locus but does not disclose the routine, input, or arithmetic operation that overflows. Exploitation requires local System execution privileges, needs no user interaction, and can lead to privilege escalation through the resulting memory corruption.

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

Integer overflow in MediaTek OMA DRM on Android 10.0 and 11.0 allows local users with System privileges to trigger memory corruption. MediaTek identifies OMA DRM as the affected locus but does not disclose the routine, input, or arithmetic operation that overflows. Exploitation requires local System execution privileges, needs no user interaction, and can lead to privilege escalation through the resulting memory corruption.

The record

CVE
CVE-2021-0627
Published
Aug 18, 2021
Updated
Aug 3, 2024
Vendor
MediaTek
Product
OMA DRM
Classifications
CWE-190, T1404
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

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.7NIST NVDCVSS: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-190Integer Overflow or Wraparound
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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