dbcve.org
HarmonyosOperating system · Huawei

CVE-2021-37062

CRITICAL · 9.1 CVSS v3.1 Published 2021-12-07
Fix available
A fix is available. Upgrade to 2.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
There is a Improper Validation of Array Index vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may lead to memory overflow and information leakage.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Improper validation of array index in Huawei smartphones allows attackers to access memory outside array bounds, potentially causing memory overflow and information leakage. This is a classic buffer access vulnerability where bounds checking is insufficient or missing when accessing array elements.

MitigationApply available Huawei security patches for affected smartphone models. Organizations should inventory Huawei devices, verify patch status, and ensure all devices are updated to the latest vendor-recommended firmware version.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
HarmonyosOperating system
Affected:< 2.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device manufacturer
    Check if the device is a Huawei smartphone by reviewing the device hardware information, system settings, or using system properties to confirm the manufacturer is Huawei
    Affected if Device is not a Huawei smartphone, then not affected by this specific vulnerability
  2. Confirm HarmonyOS is the active operating system
    Check the device operating system to verify HarmonyOS is installed and running (not EMUI or other Huawei interfaces)
    Affected if Device does not run HarmonyOS, then not affected by this specific vulnerability
  3. Determine the installed HarmonyOS version
    Access device settings: Settings > About Phone > Version, or use terminal commands like 'getprop ro.build.version.harmonyos' or 'settings list system' to retrieve the HarmonyOS version number
    Affected if HarmonyOS version is 2.0 or higher, then likely not affected; vulnerability applies to versions less than 2.0
  4. Verify the specific build or patch level
    Check the HarmonyOS build number or patch version in Settings > About Phone > Build Number, which may indicate whether security updates addressing this issue have been applied
    Affected if Build or patch level predates the security fix for CVE-2021-37062, indicating potential vulnerability

Device is affected if it is a Huawei smartphone running HarmonyOS with version less than 2.0 and lacking the corresponding security patch for this array bounds validation flaw.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.0 or later
Fixed in 2.0
Interim mitigation

Apply available Huawei security patches for affected smartphone models. Organizations should inventory Huawei devices, verify patch status, and ensure all devices are updated to the latest vendor-recommended firmware version.

Recommended fix Moderate confidence

HarmonyOS 2.0 or later

  1. Check the current HarmonyOS version on the device by navigating to Settings > About Phone > Version
  2. Backup all important data, contacts, photos, and files to a secure location
  3. Connect the device to a stable Wi-Fi network and ensure the battery is charged above 50%
  4. Navigate to Settings > System & Updates > Software Update
  5. If an update is available, download and install the HarmonyOS 2.0 or later update
  6. Restart the device after the update completes to ensure all security patches are fully applied
  7. Verify the new version is installed by checking Settings > About Phone > Version
Caveat Review Huawei's release notes for HarmonyOS 2.0 before upgrading, as major version updates may include UI changes or remove legacy features

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Harmonyos Scoped from the published advisory
  • Consultation8.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,940
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-37062 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data