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H8951 4g Esp FirmwareOperating system · Hongdian

CVE-2023-49253

CRITICAL · 9.8 CVSS v3.1 Published 2024-01-12
Fix available
A fix is available. Upgrade to 2310271149 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
Root user password is hardcoded into the device and cannot be changed in the user interface.

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 confidence

A hardcoded root password is embedded in the device firmware/configuration, providing persistent administrative access that cannot be modified through the administrative interface. This creates a permanent backdoor that allows any attacker with knowledge of these credentials to gain full control of the device with root privileges.

MitigationRestrict network access to the device management interface to trusted networks only via firewall rules or network segmentation until a vendor firmware patch removing the hardcoded credentials is available. Consider disabling remote management if not required.

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
H8951 4g Esp FirmwareOperating system
Affected:< 2310271149

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
    Check the physical device label or management interface for the exact model number. Look for 'Hongdian H8951' or similar Hongdian 4G router identifiers on the device casing or in the administrative UI.
    Affected if The device is a Hongdian H8951 4G ESP device.
  2. Check the installed firmware version
    Access the device web management interface or CLI and locate the firmware version information. Compare the version number to 2310271149 - versions before this build are affected.
    Affected if The firmware version is lower than 2310271149.
  3. Inspect firmware or configuration files for hardcoded credentials
    If you have access to the firmware image or configuration backup, search for root password strings or known hardcoded credential patterns. In the device CLI, examine /etc/shadow or similar password storage files if accessible.
    Affected if A root password is present that cannot be changed through the administrative interface or that differs from what you configured.
  4. Verify network exposure of management interface
    Check if the device management interface (typically HTTP/HTTPS on ports 80/443 or Telnet/SSH) is accessible from untrusted networks. Use port scanning or check firewall rules surrounding the device.
    Affected if The management interface is exposed to the internet or untrusted networks, allowing remote exploitation of the backdoor.

You are affected if you have a Hongdian H8951 4G ESP device running firmware version lower than 2310271149 with a management interface accessible to untrusted networks.

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 2310271149 or later
Fixed in 2310271149
Interim mitigation

Restrict network access to the device management interface to trusted networks only via firewall rules or network segmentation until a vendor firmware patch removing the hardcoded credentials is available. Consider disabling remote management if not required.

Recommended fix Moderate confidence

H8951 4g Esp Firmware version 2310271149 or later

  1. Identify the current firmware version of the H8951 4g Esp device
  2. Access the device's administrative interface or use the vendor's firmware update mechanism
  3. Upgrade the firmware to version 2310271149 or later
  4. Verify the upgrade was successful and the hardcoded root password vulnerability is resolved
  5. Change the root password through the user interface after upgrade to ensure it is no longer hardcoded

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

Fix this in H8951 4g Esp Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.

Scan for this in your stack

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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-2023-49253 in production — separate from our analysis above.

No notes yet

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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