CVE-2022-40111
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 · uneditedIn TOTOLINK A3002R TOTOLINK-A3002R-He-V1.1.1-B20200824.0128 in the shadow.sample file, root is hardcoded in the firmware.
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 confidenceThe TOTOLINK A3002R router firmware (version TOTOLINK-A3002R-He-V1.1.1-B20200824.0128) contains a hardcoded root password stored in a file named 'shadow.sample' within the firmware image. Anyone who extracts or analyzes the firmware can obtain administrative credentials, allowing unauthenticated root access to 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= 1.1.1-b20200824.0128CVSS 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 the router modelAccess the router's web administrative interface or check the device label to confirm the model is TOTOLINK A3002RAffected if The device is not a TOTOLINK A3002R router, then this specific CVE does not apply
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Check the installed firmware versionLog into the router admin panel (typically at 192.168.0.1 or 192.168.1.1), navigate to the Status or System Info page, and record the firmware version stringAffected if The firmware version is exactly 1.1.1-b20200824.0128 - note that only this exact version is affected; other versions are not vulnerable to this CVE
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Obtain the firmware image for analysisIf you have a firmware update file or can extract the firmware via the router's backup feature or TFTP, download the firmware binary to a local systemAffected if You are unable to obtain any firmware image - the remaining checks require access to the firmware binary itself
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Locate the shadow.sample fileExtract the firmware image (using tools like binwalk, firmware-mod-kit, or 7-zip) and search for a file named 'shadow.sample' within the extracted file systemAffected if A file named 'shadow.sample' exists in the firmware - this indicates the hardcoded credential vulnerability is present
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Verify the device management interface exposureCheck router firewall settings and port forwarding rules to determine if the web admin interface (ports 80/443) is accessible from external networks or the internetAffected if The router's administrative interface is exposed to untrusted networks (the internet or WAN side), combined with the hardcoded credentials, this enables remote exploitation
You are affected only if you have a TOTOLINK A3002R router running firmware version exactly 1.1.1-b20200824.0128 AND the device contains a shadow.sample file AND its management interface is externally accessible.
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 dataReplace or upgrade the firmware to a patched version if available; if no update exists, retire the device. Until remediated, ensure the device's management interface is not exposed to untrusted networks.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-40111 — 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-2022-40111 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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