CVE-2026-6632
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 · uneditedA vulnerability was identified in Tenda F451 1.0.0.7_cn_svn7958. The affected element is the function fromSafeClientFilter of the file /goform/SafeClientFilter of the component httpd. The manipulation of the argument menufacturer/Go leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
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 confidenceBuffer overflow in Tenda F451 router httpd component. The fromSafeClientFilter function in /goform/SafeClientFilter fails to properly validate the 'menufacturer' (likely 'manufacturer') parameter length before copying it into a fixed-size buffer, allowing remote attackers to overflow the buffer and potentially achieve remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 modelCheck the router label, web interface, or system info page to confirm the device is a Tenda F451 modelAffected if Device is not a Tenda F451 router (different models may have different vulnerabilities)
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Check httpd service statusAccess the router's admin panel or use network scanning to confirm the httpd web service is running on the routerAffected if httpd service is not running (the vulnerable component is not active)
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Determine firmware versionIn the router web interface, navigate to System Settings or Firmware Upgrade section to view the current firmware version; alternatively, check via telnet/SSH if availableAffected if Firmware version is unpatched and falls within the vulnerable version range (compare against any available patch releases)
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Verify SafeClientFilter endpoint accessibilityAttempt to access the /goform/SafeClientFilter endpoint locally or remotely to confirm it responds; check if the router's web interface exposes this form handlerAffected if The SafeClientFilter endpoint is not accessible or does not exist on this device
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Confirm remote management exposureCheck router firewall settings, WAN access controls, or port forwards to determine if the httpd service (port 80/443) is exposed to WAN/internetAffected if Remote management is disabled and httpd is only accessible from LAN (reduces but does not eliminate local network risk)
User is affected if they have a Tenda F451 router with httpd running, the SafeClientFilter endpoint accessible, and an unpatched firmware version, especially if remote management is enabled to WAN.
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 dataUpdate Tenda F451 firmware to a patched version if available; otherwise, disable remote management interfaces or restrict access to the httpd service via firewall rules to prevent external exploitation.
- Consultation3.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,720.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-6632 — 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-2026-6632 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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