CVE-2023-23906
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 · uneditedMissing authentication for critical function exists in SkyBridge MB-A100/110 firmware Ver. 4.2.0 and earlier, which may allow a remote unauthenticated attacker to execute some critical functions without authentication, e.g., rebooting the product.
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 confidenceThe SkyBridge MB-A100/110 IoT gateway devices running firmware Ver. 4.2.0 and earlier contain a critical authentication bypass vulnerability. Certain sensitive functions such as device reboot can be invoked via HTTP or other network interfaces without requiring any authentication credentials, allowing remote unauthenticated attackers to disrupt device operation.
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<= 4.2.0<= 4.2.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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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Identify the device modelLocate the physical device or access its management interface to confirm the model number is SkyBridge MB-A100 or MB-A110Affected if The device is an MB-A100 or MB-A110 model gateway
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Determine the firmware versionAccess the device's web interface, command line, or administrative console and locate the firmware version informationAffected if The firmware version is 4.2.0 or lower, or if the version cannot be determined and is assumed to be older
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Verify network accessibility of unauthenticated endpointsAttempt to access the device's HTTP or network management interface from an unauthorized network segment without providing credentialsAffected if The device management interface is reachable from network segments that should not have administrative access, indicating potential exposure to unauthenticated attacks
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Check for available firmware updatesConsult the vendor's support resources or device interface to identify if a firmware version newer than 4.2.0 is availableAffected if The device is running firmware version 4.2.0 or earlier and no newer version has been applied
The environment is affected if the device is a SkyBridge MB-A100 or MB-A110 running firmware version 4.2.0 or earlier, and the device management interface is accessible to unauthorized network actors.
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 · scopedApply vendor firmware update when available; until then, restrict network access to the device using firewalls or network segmentation to prevent unauthorized access to the unauthenticated endpoints.
Firmware version later than 4.2.0 (contact vendor for exact fixed version)
- Check the current firmware version of the SkyBridge MB-A100/110 device
- Visit the vendor website (www.seiko-sol.co.jp) or contact Seiko Solutions technical support to obtain the fixed firmware version
- Download the latest firmware version available from the vendor
- Follow the vendor's firmware update instructions to apply the upgrade
- After upgrading, verify that the device is running the patched firmware version
- Test that the critical functions now require proper authentication
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 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 $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-23906 — 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-2023-23906 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