CVE-2026-40621
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 · uneditedELECOM wireless LAN access point devices do not require authentication to access some specific URLs. The affected product may be operated without authentication.
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 confidenceELECOM wireless LAN access point devices contain an authentication bypass vulnerability where specific URLs can be accessed without any authentication credentials. This allows unauthenticated attackers to potentially access sensitive management functions or configuration interfaces of the access points.
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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/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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Confirm device is an ELECOM wireless access pointCheck the device model number, label, or management interface for ELECOM branding and verify it is a wireless LAN access point productAffected if The device is an ELECOM wireless LAN access point and falls within the affected product range
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Determine if the management interface is network-exposedReview firewall rules, VLAN configuration, or network access controls to determine if the device's web management interface (typically ports 80/443 or custom HTTP/HTTPS ports) is accessible from untrusted networks such as the internet or guest networksAffected if The management interface is accessible from untrusted network segments without proper access restrictions
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Test for unauthenticated URL accessSend HTTP/HTTPS requests to common management paths such as /, /admin, /status, /config, or /login without providing any authentication credentials and observe if valid management pages or configuration data are returnedAffected if Management pages, configuration interfaces, or sensitive status information are returned without requiring authentication
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Check for unauthorized configuration changesReview the device configuration logs, audit logs, or recent configuration changes for entries indicating modifications made from unexpected source IP addresses or without corresponding authentication eventsAffected if Configuration changes or access events appear in logs without associated successful authentication records
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Verify firmware version against vendor release notesAccess the device management interface or use SNMP/CLI to retrieve the current firmware version, then compare against any vendor advisory or release notes for CVE-2026-40621 if available on ELECOM support siteAffected if The installed firmware version matches or predates the affected versions identified in vendor documentation
You are affected if you operate an ELECOM wireless LAN access point with its management interface exposed to untrusted networks and can access management URLs without authentication credentials.
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 dataImmediately restrict network access to the affected access points using firewall rules or VLAN isolation, and check ELECOM's support site for available firmware updates that address this authentication bypass.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40621 — 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-2026-40621 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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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.
- 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