dbcve.org
P2r8852e2 FirmwareOperating system · Meritlilin

CVE-2021-30167

CRITICAL · 9.8 CVSS v3.1 Published 2021-04-28
Fix available
A fix is available. Upgrade to 7.1.94.8908 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
The manage users profile services of the network camera device allows an authenticated. Remote attackers can modify URL parameters and further amend user’s information and escalate privileges to control the devices.

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 confidence

This CVE affects network camera devices where the manage users profile service allows authenticated remote attackers to modify URL parameters and alter user information. Attackers can exploit this to escalate privileges and gain full control of the device.

MitigationApply vendor-provided firmware patches when available. Until patched, restrict network access to camera management interfaces and implement strict authentication controls.

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
P2r8852e2 FirmwareOperating system
Affected:< 7.1.94.8908
P2r8852e4 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6852e2 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6852e4 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6552e2 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6552e4 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6352ae2 FirmwareOperating system
Affected:< 7.1.94.8908
P2r6352ae4 FirmwareOperating system
Affected:< 7.1.94.8908

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model
    Access the camera web interface or check the device label to confirm it is a Meritlilin P2r series camera (P2r8852e2, P2r8852e4, P2r6852e2, P2r6852e4, P2r6552e2, P2r6552e4, P2r6352ae2, or P2r6352ae4)
    Affected if The device is a Meritlilin P2r series model
  2. Check the installed firmware version
    Navigate to the camera firmware settings in the web interface or use the vendor-provided utility to retrieve the current firmware version number
    Affected if The firmware version is lower than 7.1.94.8908
  3. Verify user account configuration
    Log into the camera administration panel and review the user list under the user management or accounts section
    Affected if Unexpected user accounts exist, unauthorized privilege changes are detected, or the admin account has been modified
  4. Check for the manage users profile service
    Locate the user profile management service in the camera web interface, typically found under settings, user management, or accounts configuration
    Affected if The user profile management service is accessible and allows parameter modification without proper validation

The device is affected if it is a Meritlilin P2r series camera running firmware version lower than 7.1.94.8908 with an accessible user management service.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 7.1.94.8908 or later
Fixed in 7.1.94.8908
Interim mitigation

Apply vendor-provided firmware patches when available. Until patched, restrict network access to camera management interfaces and implement strict authentication controls.

Recommended fix Moderate confidence

Firmware version 7.1.94.8908 or later

  1. Identify the specific camera model (P2r8852e2, P2r8852e4, P2r6852e2, P2r6852e4, P2r6552e2, P2r6552e4, P2r6352ae2, or P2r6352ae4) from the device label or management interface
  2. Access the device's web-based administration interface using administrative credentials
  3. Navigate to the firmware upgrade or system maintenance section (commonly labeled as 'Firmware Upgrade', 'System Update', or 'Maintenance')
  4. Download the firmware version 7.1.94.8908 or later from the device vendor's official support website
  5. Upload the firmware file through the web interface or using the vendor's firmware upgrade tool
  6. Wait for the firmware upload and installation to complete - do not power off the device during this process
  7. After reboot, verify the firmware version has been updated to 7.1.94.8908 or higher in the system information section
  8. As a security precaution, review and update all user account passwords after the upgrade
Caveat Firmware upgrades may temporarily disrupt camera operation; ensure backup of configuration if possible; some legacy settings may need reconfiguration after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in P2r8852e2 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-30167 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-30167 in production — separate from our analysis above.

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.

What this is

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.

What belongs here
  • 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