CVE-2021-3616
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 reported in Lenovo Smart Camera X3, X5, and C2E that could allow an unauthorized user to view device information, alter firmware content and device configuration. This vulnerability is the same as CNVD-2020-68651.
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 confidenceThe vulnerability is an authentication/authorization bypass in Lenovo Smart Camera X3, X5, and C2E devices that allows unauthenticated attackers to access device information, modify firmware content, and alter device configuration settings. This represents a critical failure in access controls on the affected IoT camera devices.
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< 01.03.29.16< 01.03.29.16< 01.03.29.16CVSS 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 Lenovo Smart Camera modelLocate the model number on the device label or check the device management interface for the model designation (X3, X5, or C2E)Affected if The device is a Lenovo Smart Camera X3, X5, or C2E model
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Determine the installed firmware versionAccess the camera's web interface or mobile app and navigate to the device settings or system information section to view the current firmware versionAffected if The firmware version cannot be determined or is not visible
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Compare firmware version against affected rangeCheck if the installed firmware version is below 01.03.29.16 for the identified model (C2e, X3, or X5)Affected if The firmware version is below 01.03.29.16 for any of the three affected models
A user is affected if they have a Lenovo Smart Camera X3, X5, or C2E running firmware version earlier than 01.03.29.16.
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.
dbcve · scoped01.03.29.16
Apply vendor-supplied firmware updates when available; otherwise, restrict network exposure by placing devices behind firewalls or VPNs, and disable remote access features to limit attack surface.
Firmware version 01.03.29.16 or later
- Identify the exact model of Lenovo Smart Camera (C2e, X3, or X5)
- Check the current firmware version through the device interface or mobile app
- Download the firmware update 01.03.29.16 or later from Lenovo's official support site (iknow.lenovo.com.cn)
- Follow Lenovo's standard firmware update procedure to apply the upgrade
- Verify the firmware version has been successfully updated to 01.03.29.16 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-3616 — 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-2021-3616 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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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