CVE-2023-33375
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 · uneditedConnected IO v2.1.0 and prior has a stack-based buffer overflow vulnerability in its communication protocol, enabling attackers to take control over devices.
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 confidenceConnected IO v2.1.0 and prior contains a stack-based buffer overflow vulnerability in its communication protocol. Attackers can overflow a stack-allocated buffer by sending specially crafted messages through the protocol, allowing them to overwrite return addresses and potentially achieve remote code execution and device takeover.
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<= 2.1.0CVSS 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
- High
- Availability
- High
CVSS:3.1/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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Identify if ConnectedIO Connected Io is presentLocate the ConnectedIO device or software installation in your environment. Check device inventory records, network scans, or physical device labels for the ConnectedIO Connected Io product.Affected if The product is present in your environment.
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Determine the installed versionAccess the device management interface, firmware information, or software inventory to retrieve the version number of ConnectedIO Connected Io.Affected if The version is 2.1.0 or any prior version.
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Verify communication protocol is enabledCheck the device or software configuration for the communication protocol functionality. This may be accessible through the management interface, configuration files, or service settings.Affected if The communication protocol feature is enabled and operational.
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Assess network exposureDetermine if the device is accessible over the network on ports or interfaces used by the communication protocol. Review firewall rules, network segmentation, and access control lists.Affected if The device is directly accessible from untrusted network segments.
You are affected if ConnectedIO Connected Io version 2.1.0 or earlier is installed with the communication protocol enabled and accessible on the network.
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 dataUpgrade to a patched version if available; otherwise, implement strict input length validation and bounds checking on all protocol message handling, replace unsafe string functions with safe alternatives, and consider network segmentation to limit exposure to untrusted network segments.
- Consultation6.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-33375 — 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-2023-33375 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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