CVE-2021-37133Network attack vector

Unauthenticated file disclosure via unspecified mechanism

Published Jan 3, 2022 · Updated May 22, 2025

Unauthorized file access in Huawei HarmonyOS 2.0 and affected EMUI releases allows remote attackers to read device files over a network. Huawei has not disclosed the affected component, request form, pathname handling, or wrong operation enabling unauthorized file retrieval. No authentication or user interaction is required; the reported consequence is file confidentiality loss, with no integrity or availability impact.

CVSS severity7.5
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unauthorized file access in Huawei HarmonyOS 2.0 and affected EMUI releases allows remote attackers to read device files over a network. Huawei has not disclosed the affected component, request form, pathname handling, or wrong operation enabling unauthorized file retrieval. No authentication or user interaction is required; the reported consequence is file confidentiality loss, with no integrity or availability impact.

The record

CVE
CVE-2021-37133
Published
Jan 3, 2022
Updated
May 22, 2025
Vendor
Huawei Technologies Co., Ltd.
Product
HarmonyOS
Classifications
T1533
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2022CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Huawei Technologies Co., Ltd. · HarmonyOSversion=2.0
MindSpore · EMUIversion=10.0.0; version=10.1.0; version=10.1.1; version=9.1.0; version=9.1.1

Published CVSS scores

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

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1533Data from Local System

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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