CVE-2023-39403Network attack vector

Unauthorized sandbox file access via improper parameter verification

Published Aug 13, 2023 · Updated Oct 9, 2024

Improper authorization in Huawei HarmonyOS and EMUI installd allows remote attackers to read and write sandbox files without authorization. The installd module fails to verify an undisclosed parameter before permitting sandbox file operations; Huawei has not disclosed the parameter or request path. Affected releases are HarmonyOS 2.0.0, 2.0.1, 2.1.0, 3.0.0, and 3.1.0, and EMUI 11.0.1, 12.0.0, 12.0.1, and 13.0.0; no privileges or user interaction are required.

CVSS severity9.1
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Huawei HarmonyOS and EMUI installd allows remote attackers to read and write sandbox files without authorization. The installd module fails to verify an undisclosed parameter before permitting sandbox file operations; Huawei has not disclosed the parameter or request path. Affected releases are HarmonyOS 2.0.0, 2.0.1, 2.1.0, 3.0.0, and 3.1.0, and EMUI 11.0.1, 12.0.0, 12.0.1, and 13.0.0; no privileges or user interaction are required.

The record

CVE
CVE-2023-39403
Published
Aug 13, 2023
Updated
Oct 9, 2024
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-358, CWE-285, T1409
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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=2.0.0
  2. Affected versionversion=2.0.1
  3. Affected versionversion=2.1.0
  4. Affected versionversion=3.0.0
  5. Affected versionversion=3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=2.0.0; version=2.0.1; version=2.1.0; version=3.0.0; version=3.1.0
MindSpore · EMUIversion=11.0.1; version=12.0.0; version=12.0.1; version=13.0.0

Published CVSS scores

9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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

CWE-358Improperly Implemented Security Check for Standard
CWE-285Improper Authorization
T1409Access Stored Application Data

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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