CVE-2025-66323
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 · uneditedVulnerability of improper criterion security check in the card module. Impact: Successful exploitation of this vulnerability may affect availability.
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 confidenceThis is a security check bypass vulnerability in a card module where the validation logic uses improper criteria. The flaw allows attackers to potentially cause availability issues, likely through crafted input that bypasses intended security restrictions in the card processing or validation logic.
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= 5.0.1= 5.1.0= 6.0.0CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 checksWork through these to decide whether this CVE applies to you.
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Determine HarmonyOS versionCheck the device or system settings to find the installed HarmonyOS version number, typically found in Settings > About Device > HarmonyOS versionAffected if The installed version is exactly 5.0.1, 5.1.0, or 6.0.0
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Identify card module presenceCheck if a card module or card-related feature is installed on the system; look for card services, payment card handling, or identity card management components in the system application list or module directoryAffected if The card module is present and active on the device
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Examine card module security configurationReview the security validation configuration files or settings for the card module, specifically looking at the validation criteria used for security checks on card-related operationsAffected if The card module uses improper or incomplete validation criteria for security checks
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Test for availability impactIf the card module is present on an affected HarmonyOS version, verify if crafted input to card processing functions triggers unexpected behavior or availability impactAffected if The system exhibits availability issues when processing specific card-related inputs that should be blocked by proper security validation
A user is affected if their HarmonyOS version is exactly 5.0.1, 5.1.0, or 6.0.0 AND the card module with the vulnerable validation logic is present and active on their device.
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.
From vendor dataReview and correct the security check criteria in the card module to ensure proper validation logic is enforced; implement input sanitization and deny-by-default patterns for card-related operations.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-66323 — 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-2025-66323 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
- No spam, self-promotion, credentials, or personal data