CVE-2025-66329

Local availability impairment via improper permission control

Published Dec 8, 2025 · Updated Jun 9, 2026

Permission control failure in Huawei HarmonyOS and EMUI window management allows local users to impair device availability. Huawei has not disclosed the permission check, callable operation, or resulting failure mode within the window management module. Local execution with no user interaction is required; published evidence limits the consequence to an unspecified availability interruption.

CVSS severity4.0
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permission control failure in Huawei HarmonyOS and EMUI window management allows local users to impair device availability. Huawei has not disclosed the permission check, callable operation, or resulting failure mode within the window management module. Local execution with no user interaction is required; published evidence limits the consequence to an unspecified availability interruption.

The record

CVE
CVE-2025-66329
Published
Dec 8, 2025
Updated
Jun 9, 2026
Vendor
MindSpore
Product
HarmonyOS
Classifications
CWE-264
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record 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=3.0.0
  3. Affected versionversion=3.1.0
  4. Affected versionversion=4.0.0
  5. Affected versionversion=4.2.0
  6. Affected versionversion=4.3.0
  7. Affected versionversion=4.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

MindSpore · HarmonyOSversion=2.0.0; version=3.0.0; version=3.1.0; version=4.0.0; version=4.2.0; version=4.3.0; version=4.3.1
MindSpore · EMUIversion=12.0.0; version=13.0.0; version=14.0.0; version=14.2.0; version=15.0.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0Huawei PSIRTCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-264Permissions, Privileges, and Access Controls

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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