CVE-2021-3022

Partition modification via missing write protection

Published Jan 5, 2021 · Updated Aug 3, 2024

Insufficient write protection in LG mobile devices running Android 10 allows local users to modify the MediaTek protect2 partition. The device exposes the protect2 block partition without enforcing write protection, permitting low-privileged local writes to protected data. Exploitation requires local low-privileged access; public records identify integrity impact but do not disclose which data the partition stores.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient write protection in LG mobile devices running Android 10 allows local users to modify the MediaTek protect2 partition. The device exposes the protect2 block partition without enforcing write protection, permitting low-privileged local writes to protected data. Exploitation requires local low-privileged access; public records identify integrity impact but do not disclose which data the partition stores.

The record

CVE
CVE-2021-3022
Published
Jan 5, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1641
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 5, 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?

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

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1641Data Manipulation

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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