CVE-2025-31174
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 · uneditedPath traversal vulnerability in the DFS module Impact: Successful exploitation of this vulnerability may affect service 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 confidenceCVE-2025-31174 is a path traversal vulnerability in the DFS (Distributed File System) module. The vulnerability allows attackers to manipulate file paths using '..' sequences or absolute paths to access files outside the intended directory boundaries, potentially exposing sensitive system files and compromising service 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= 5.0.0CVSS 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
- 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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Identify HarmonyOS versionCheck the installed HarmonyOS version on the device or system using system settings or 'getprop' command (e.g., 'getprop ro.build.version.harmonyos' or check About Phone in Settings)Affected if Version is exactly 5.0.0 (exact match)
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Confirm DFS module is activeVerify the Distributed File System (DFS) module is enabled and in use on the HarmonyOS device - check system services or module status via 'hdc shell' or device management interfaceAffected if DFS module is enabled and running
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Inspect DFS file operationsReview any logs, configurations, or network traffic involving the DFS module's file access functionality to identify if user-controlled path parameters are processedAffected if DFS module handles file paths from external or untrusted input
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Test for path traversal exposureIf you have access to DFS interfaces, observe whether path inputs containing '../' sequences or absolute paths like '/data/' are accepted and processed without validationAffected if Path traversal sequences are accepted without rejection or canonicalization
You are affected only if your HarmonyOS version is exactly 5.0.0 AND the DFS module is actively handling file paths that can be user-controlled without validation.
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 dataImplement strict input validation and canonicalization checks on all file path parameters in the DFS module, ensuring paths are normalized and verified against an allowlist of permitted directories before file operations are performed.
- Consultation2.0 h
- Implementation8.0 h
- Testing4.0 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 $4,480.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31174 — 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-2025-31174 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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