CVE-2024-34021
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 · uneditedUnrestricted upload of file with dangerous type vulnerability exists in ELECOM wireless LAN routers. A specially crafted file may be uploaded to the affected product by a logged-in user with an administrative privilege, resulting in an arbitrary OS command execution.
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 · high confidenceUnrestricted file upload vulnerability in ELECOM wireless LAN routers allows authenticated administrative users to upload specially crafted files, leading to arbitrary OS command execution. The vulnerability stems from insufficient validation of uploaded file types on the router's web interface.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- Adjacent
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/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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Identify the router modelAccess the router's administrative interface or check the device label/mac address OUI to confirm it is an ELECOM wireless LAN router. Use the router's web UI or CLI to display the device model information.Affected if The device is an ELECOM wireless LAN router model.
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Confirm web management interface is enabledAttempt to access the router's web interface via HTTP/HTTPS on the default admin port (typically 80 or 443). Check the router's settings to verify the web management feature is turned on.Affected if The router's web-based administrative interface is accessible and enabled.
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Verify admin user accounts existLog into the router's web interface and navigate to the admin/user management section. Check for configured administrative accounts with upload privileges.Affected if Administrative user accounts are configured on the router.
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Locate file upload functionalityIn the router's web interface, look for features that allow file uploads such as firmware upgrade, configuration backup/restore, certificate upload, or log upload. These are typical paths where the unrestricted file upload may be present.Affected if The router's web interface includes any file upload feature for firmware, configuration, certificates, or logs.
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Check for file type validation on upload functionsAttempt to upload a file with an unexpected extension (such as a non-image/non-config file) through the identified upload features. Observe whether the router accepts the file without validating its type.Affected if The router accepts files without proper type validation, allowing arbitrary file uploads.
You are affected if you have an ELECOM wireless LAN router with its web administrative interface enabled and any file upload functionality that lacks proper file type 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 dataRestrict administrative access to trusted users only and implement strict file type validation and sanitization on the router's firmware. Apply vendor patches when available.
- Consultation4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-34021 — 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-2024-34021 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