CVE-2021-0904

Local privilege escalation via insecure resource permissions

Published Dec 15, 2021 · Updated Aug 3, 2024

Permission bypass in MediaTek SRAMROM on Android 8.1 through 11.0 allows local users with System execution privileges to elevate privileges. The SRAMROM component assigns insecure permissions to a critical resource, allowing the caller to bypass the intended access restriction. Exploitation requires local code already running with System privileges, needs no user interaction, and the resulting privilege level is undisclosed.

CVSS severity6.7
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

Permission bypass in MediaTek SRAMROM on Android 8.1 through 11.0 allows local users with System execution privileges to elevate privileges. The SRAMROM component assigns insecure permissions to a critical resource, allowing the caller to bypass the intended access restriction. Exploitation requires local code already running with System privileges, needs no user interaction, and the resulting privilege level is undisclosed.

The record

CVE
CVE-2021-0904
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-732, T1404
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 15, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
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 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-732Incorrect Permission Assignment for Critical Resource
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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