CVE-2022-40100
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 i9 v1.0.0.8(3828) was discovered to contain a command injection vulnerability via the FormexeCommand function.
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 confidenceTenda i9 router firmware v1.0.0.8(3828) contains a command injection vulnerability in the FormexeCommand function, allowing remote attackers to execute arbitrary OS commands via unsanitized user input. This is a critical flaw as it can be exploited without authentication, potentially giving attackers full control of the device.
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= 1.0.0.8\(3828\)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
- 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.
-
Identify the device modelLocate the device label or access the router web interface to confirm the model is Tenda i9Affected if The device is a Tenda i9 router
-
Check the installed firmware versionAccess the router admin panel (typically at http://192.168.0.1) and navigate to System Settings or Firmware Upgrade to view the current firmware version, or use the router CLI if availableAffected if The firmware version is exactly 1.0.0.8(3828)
-
Confirm the web management interface is accessibleAttempt to reach the router web interface over HTTP/HTTPS from the networkAffected if The web interface is exposed and responds to requests
-
Verify the FormexeCommand function existsInspect HTTP requests to the router web interface for endpoints that invoke FormexeCommand - this function handles command execution and may accept user-supplied parametersAffected if The FormexeCommand function is present and accepts unsanitized input
A user is affected if they have a Tenda i9 router running firmware version 1.0.0.8(3828) with the web management interface accessible, as this specific version contains the command injection flaw in the FormexeCommand function.
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 to a patched firmware version if available; if no patch exists, restrict network access to the device's management interface and monitor for indicators of compromise.
- Consultation6.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,712.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-40100 — 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-2022-40100 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data