CVE-2022-43027
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 · uneditedTenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the firewallEn parameter at /goform/SetFirewallCfg.
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 stack buffer overflow vulnerability exists in the Tenda TX3 router's web interface. The overflow occurs in the SetFirewallCfg form handler when processing the firewallEn parameter, allowing an attacker to overflow a stack-based buffer. With a CVSS 9.8 rating, this vulnerability is exploitable remotely without authentication and could lead to complete system compromise via remote code execution.
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= 16.03.13.11CVSS 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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Confirm Tenda TX3 router modelAccess the router admin interface or check the device label/marketing materials to verify the exact model is Tenda TX3Affected if Device is not a Tenda TX3 router - different models are not affected by this specific vulnerability
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Identify firmware versionLog into the router web interface and navigate to System Settings > Firmware Upgrade, or check the administration page for the current firmware version stringAffected if Firmware version is 16.03.13.11 - only this exact version is listed as affected
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Verify web interface is accessibleAttempt to access the router's HTTP/HTTPS web management interface (typically at the router's LAN IP address such as 192.168.0.1)Affected if The web interface is reachable on the network - the vulnerability exists in the SetFirewallCfg form handler which is part of the web application
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Confirm SetFirewallCfg endpoint is presentInspect the router's web interface for a firewall configuration section or attempt to identify the SetFirewallCfg form handler through direct request probing if you have authorizationAffected if The SetFirewallCfg handler with firewallEn parameter processing is present and exposed - this is the specific component containing the overflow
You are affected if you have a Tenda TX3 router running firmware version 16.03.13.11 with the web management interface accessible and the SetFirewallCfg firewall configuration handler exposed.
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 dataThe stack overflow must be remediated by implementing proper bounds checking on the firewallEn parameter in the SetFirewallCfg handler. This typically requires obtaining the firmware, locating the vulnerable code, adding input validation, recompiling the firmware, and deploying the patched version to affected devices.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,776.
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Free · runs locallyCheck whether your project pulls in CVE-2022-43027 — 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-2022-43027 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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- Version or environment caveats, and links to real fixes
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