CVE-2023-40710
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 · uneditedAn adversary could cause a continuous restart loop to the entire device by sending a large quantity of HTTP GET requests if the controller has the built-in web server enabled but does not have the built-in web server completely set up and configured for the SNAP PAC S1 Firmware version R10.3b
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 confidenceThis is a denial-of-service vulnerability in SNAP PAC S1 controllers running firmware R10.3b. An unauthenticated remote attacker can trigger a continuous restart loop by sending a large volume of HTTP GET requests when the built-in web server is enabled but not fully configured. The condition appears to be triggered by incomplete web server initialization states.
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= r10.3bCVSS 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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Confirm device model is Snap Pac S1Access the controller admin interface or use the manufacturer's discovery tool to verify the hardware model is specifically a Snap Pac S1 controller.Affected if The device is not a Snap Pac S1 controller.
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Check firmware versionLog into the controller admin interface or use the manufacturer's management software to view the currently installed firmware version.Affected if The installed firmware is version R10.3b.
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Verify web server statusAccess the controller web interface or management console and locate the built-in web server configuration settings. Determine whether the web server is currently enabled.Affected if The built-in web server is enabled.
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Check web server configuration stateExamine the web server configuration panel to determine if it is fully configured according to manufacturer guidance, or if it remains in an incomplete or uninitialized state.Affected if The web server is enabled but not fully configured or is in an incomplete initialization state.
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Look for restart loop indicatorsCheck the controller event logs, system status page, or monitor network connectivity for repeated unexpected reboots or device unavailability patterns.Affected if The device exhibits frequent unexpected restarts or periodic unavailability.
A user is affected if they have a Snap Pac S1 controller running firmware R10.3b with the built-in web server enabled but not fully configured, and they observe repeated restart cycles or device instability.
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 dataAdministrators should either fully configure and set up the built-in web server according to manufacturer guidance or disable it entirely if not needed, to prevent the malformed request handling that leads to device restart loops.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-40710 — 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-2023-40710 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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