CVE-2023-51135
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 · uneditedTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formPasswordSetup.
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-based buffer overflow vulnerability exists in the formPasswordSetup function of TOTOLINK X2000R Gh router firmware (v1.0.0-B20230221.0948.web). The lack of proper bounds checking on password input allows remote attackers to overwrite stack memory and potentially achieve remote code execution via crafted HTTP requests.
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= 1.0.0-b20230221.0948.webCVSS 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 device model and firmware versionAccess the router's web management interface and navigate to System Status or Firmware Upgrade page to view the current firmware version. Alternatively, check the firmware file name if you have access to the firmware image or backup.Affected if Firmware version is exactly 1.0.0-b20230221.0948.web
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Verify the formPasswordSetup function existsInspect the firmware binary for the formPasswordSetup function using binwalk to extract and strings/grep to locate the function, or check if the web server responds to requests targeting this function endpoint.Affected if The formPasswordSetup function is present in the firmware build
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Check if web management interface is exposedDetermine if the router's HTTP/HTTPS management port (typically 80/443) is accessible from untrusted networks by testing remote IP connectivity to the device's WAN IP on port 80/443, or review port forwarding/firewall rules.Affected if The web management interface is reachable from untrusted/external networks
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Confirm password change functionality is accessibleSend a crafted HTTP POST request to the formPasswordSetup endpoint (commonly /cgi-bin/luci or /cgi-bin/api) or access the password change page through the web interface to verify the function handles password input.Affected if The password change or setup function is accessible and accepts user input
The device is affected if it is a TOTOLINK X2000R router running firmware version 1.0.0-b20230221.0948.web with the formPasswordSetup function present and the web management interface exposed to untrusted networks.
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 dataApply vendor-supplied firmware patch when available; immediately restrict exposure of the device's web management interface to trusted networks or disable remote administration if the vulnerability cannot be patched.
- Consultation4.0 h
- Implementation2.0 h
- Testing6.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-51135 — 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-2023-51135 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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