CVE-2021-30166
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 · uneditedThe NTP Server configuration function of the IP camera device is not verified with special parameters. Remote attackers can perform a command Injection attack and execute arbitrary commands after logging in with the privileged permission.
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 NTP Server configuration function in IP camera devices lacks proper input validation, allowing authenticated remote attackers with administrative privileges to inject and execute arbitrary operating system commands through specially crafted NTP configuration parameters.
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< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908< 7.1.94.8908CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 modelAccess the device web interface or use SNMP/UPnP to retrieve the exact model number. Common paths include the device status page, System Information page, or banner information from the management interface.Affected if The device model is one of: P2r8852e2, P2r8852e4, P2r6852e2, P2r6852e4, P2r6552e2, P2r6552e4, P2r6352ae2, or P2r6352ae4.
-
Check the installed firmware versionNavigate to the device settings page (usually under System, Maintenance, or About) to view the firmware version. This may also be obtainable via the device's API endpoint or by querying the web interface for version information.Affected if The firmware version is less than 7.1.94.8908.
-
Confirm NTP server configuration feature is accessibleLocate the NTP or Time Settings configuration panel within the device web interface. Verify that the NTP server configuration fields are present and accessible to an authenticated user.Affected if The NTP configuration interface is available and the device has network connectivity to accept NTP server input.
-
Verify administrative access statusDetermine whether the device management interface is exposed to the network and assess the current authentication state. Check if default credentials are in use or if administrative accounts are accessible.Affected if The device administrative interface is reachable over the network with valid administrative credentials.
The device is affected if it is a Meritlilin model from the affected list running firmware version lower than 7.1.94.8908 and has its NTP configuration feature accessible to an authenticated administrator.
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 data7.1.94.8908
Restrict administrative access to the device management interface and implement proper input sanitization for all configuration parameters, particularly NTP server settings.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30166 — 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-2021-30166 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