CVE-2021-46813Network attack vector

Availability interruption via residual update files

Published Jun 13, 2022 · Updated Aug 4, 2024

Improper file cleanup in Huawei EMUI 11.0.0 allows remote attackers to interrupt device availability through the ChinaDRM module after an update. The ChinaDRM update path leaves residual files in place instead of deleting them; Huawei has not published the exact trigger or resulting failure mode. Network access is sufficient, with no privileges or user interaction required, and the documented consequence is limited to an availability interruption.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper file cleanup in Huawei EMUI 11.0.0 allows remote attackers to interrupt device availability through the ChinaDRM module after an update. The ChinaDRM update path leaves residual files in place instead of deleting them; Huawei has not published the exact trigger or resulting failure mode. Network access is sufficient, with no privileges or user interaction required, and the documented consequence is limited to an availability interruption.

The record

CVE
CVE-2021-46813
Published
Jun 13, 2022
Updated
Aug 4, 2024
Vendor
MindSpore
Product
EMUI
Classifications
CWE-212
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=11.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · EMUIversion=11.0.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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