CVE-2021-40025
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 · uneditedThe eID module has a vulnerability that causes the memory to be used without being initialized,Successful exploitation of this vulnerability may affect data confidentiality.
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 confidenceThe eID module contains a vulnerability where memory is used without proper initialization. This uninitialized memory use can lead to information disclosure as residual data from previous memory contents may be exposed, potentially compromising data confidentiality.
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< 2.0CVSS 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
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 checksWork through these to decide whether this CVE applies to you.
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Check HarmonyOS versionGo to Settings > About Phone > Version on the Huawei device, or run 'getprop ro.build.version.harmonyos' via ADB shellAffected if Version is below 2.0 (e.g., 1.x releases)
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Verify eID module presenceCheck if the eID (electronic ID) application or service is installed on the device. Look for eID-related apps in the app drawer or check via 'pm list packages | grep eid' in ADB shellAffected if eID module is installed and active on the device
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Check eID service processRun 'ps -A | grep eid' or 'dumpsys activity service | grep eID' via ADB shell to identify if the eID service is runningAffected if The eID service process is actively running on the device
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Confirm vulnerability scopeSince the flaw requires uninitialized memory access in the eID module, check if the device has been used for eID operations (eID enrollment or authentication). Review any eID-related logs if availableAffected if The device has an active eID module with version < 2.0 and has performed eID operations
The device is affected if it runs HarmonyOS version below 2.0 AND has the eID module installed or enabled, as the uninitialized memory vulnerability exists specifically within the eID module component.
Generated from the published advisory. Verify against your own configuration.
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 · scoped2.0
Initialize all memory buffers before use in the eID module, ensuring proper memory zeroing or initialization routines are called before accessing allocated memory regions.
HarmonyOS 2.0
- Upgrade HarmonyOS to version 2.0 or later to remediate the uninitialized memory vulnerability in the eID module
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-40025 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-40025 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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