CVE-2023-25642
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 · uneditedThere is a buffer overflow vulnerability in some ZTE mobile internet producsts. Due to insufficient validation of tcp port parameter, an authenticated attacker could use the vulnerability to perform a denial of service attack.
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 confidenceA buffer overflow vulnerability exists in ZTE mobile internet products due to insufficient validation of the TCP port parameter. An authenticated attacker can exploit this by providing a specially crafted TCP port value that overflows a buffer, causing the device to crash or become unresponsive, resulting in denial of service.
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= mc801a_elisa3_b19= mc801a1_elisa1_b04CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 modelAccess the device admin interface or check the device label to confirm the exact model number (Mc801a or Mc801a1)Affected if Device model is not Mc801a or Mc801a1 - the vulnerability only affects these specific models
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Check the installed firmware versionLog into the device admin panel or use the command interface (e.g., AT commands or web UI) to retrieve the firmware version informationAffected if Firmware version matches mc801a_elisa3_b19 or mc801a1_elisa1_b04 exactly - only these specific versions are affected
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Verify TCP port configuration accessNavigate to the device settings to locate any TCP port configuration, port forwarding, or network service settings that accept TCP port parametersAffected if The device has a feature that accepts TCP port input and this feature is accessible to authenticated users - exploitation requires sending a crafted TCP port value that overflows a buffer
The environment is affected only if the device is a Zte Mc801a or Mc801a1 running the exact firmware version mc801a_elisa3_b19 or mc801a1_elisa1_b04 respectively, and the TCP port configuration feature is accessible to authenticated users.
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 dataImplement proper input validation and bounds checking for all TCP port parameters before use in buffer operations. Apply vendor-supplied patches or firmware updates when available. If no patch exists, consider network segmentation and access controls to limit exposure to authenticated attackers.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-25642 — 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-2023-25642 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
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