CVE-2020-9142Network attack vector

Memory corruption via malformed update file

Published Jan 13, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in affected Huawei EMUI and Magic UI releases allows remote attackers to overwrite memory via an update file. The update-file processing path incorrectly handles file contents and writes beyond the allocated heap buffer; Huawei has not published a component or function name. Network access and no authentication or user interaction are required, and the published impact is limited to memory corruption with integrity and availability loss.

CVSS severity9.1
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in affected Huawei EMUI and Magic UI releases allows remote attackers to overwrite memory via an update file. The update-file processing path incorrectly handles file contents and writes beyond the allocated heap buffer; Huawei has not published a component or function name. Network access and no authentication or user interaction are required, and the published impact is limited to memory corruption with integrity and availability loss.

The record

CVE
CVE-2020-9142
Published
Jan 13, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2021CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
6.4NIST NVDAV:N/AC:L/Au:N/C:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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