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H8951 4g Esp FirmwareOperating system · Hongdian

CVE-2023-49255

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
The router console is accessible without authentication at "data" field, and while a user needs to be logged in in order to modify the configuration, the session state is shared. If any other user is currently logged in, the anonymous user can execute commands in the context of the authenticated one. If the logged in user has administrative privileges, it is possible to use webadmin service configuration commands to create a new admin user with a chosen password.

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

A router console exposes an unauthenticated endpoint at the 'data' field that shares session state with authenticated users. When any user is logged in, an anonymous attacker can execute commands within the context of the authenticated session. If an administrator is logged in, the attacker can leverage webadmin service configuration commands to create new admin accounts with arbitrary passwords, achieving full privilege escalation.

MitigationApply vendor firmware updates when available; if no patch exists, restrict network access to the router management interface to trusted IPs only, and ensure no untrusted users can reach the console.

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. Confirm device model is Hongdian H8951
    Access the router console or web interface and check the device information page or system status to identify the exact model number
    Affected if The device model is not Hongdian H8951 (different models may have different vulnerabilities)
  2. Check firmware version against affected range
    Navigate to the router's webadmin interface, typically at the '/system' or '/about' page, or log into the console and run 'version' or 'system info' command to retrieve the firmware build number
    Affected if The installed firmware version is lower than 2310271149 (e.g., 2310271148 or earlier)
  3. Verify webadmin service is exposed
    Check the router's firewall or port forwarding settings to determine if TCP ports 80/443 (HTTP/HTTPS) for the webadmin interface are accessible from untrusted networks or the WAN interface
    Affected if The webadmin service is reachable from untrusted networks (WAN side) without network segmentation or IP restrictions
  4. Check for active authenticated sessions
    In the webadmin interface, navigate to the session management or user status section, or log into the console and check for logged-in users using 'show users' or 'session list' commands
    Affected if Any administrative or user session is active while the webadmin interface is exposed to untrusted networks

You are affected if you have a Hongdian H8951 device running firmware version below 2310271149 with the webadmin interface accessible from untrusted networks and an active user session present.

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

Apply vendor firmware updates when available; if no patch exists, restrict network access to the router management interface to trusted IPs only, and ensure no untrusted users can reach the console.

Recommended fix Moderate confidence

H8951 4g Esp Firmware version 2310271149 or later

  1. 1. Identify the current firmware version of the H8951 4g Esp router by accessing the router's web interface or admin console
  2. 2. Navigate to the router's administration or system settings section where firmware information is displayed
  3. 3. If the current firmware version is earlier than 2310271149, download the latest firmware update from the router manufacturer's official support channel
  4. 4. Upload and apply the firmware update through the router's web-based administration interface
  5. 5. After the firmware update completes, verify that the router has been updated to version 2310271149 or later
  6. 6. Confirm the vulnerability is remediated by ensuring the router console at the 'data' field now requires authentication
Caveat Firmware updates may reset router configuration to defaults; back up current configuration before upgrading and reapply settings after update

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

Fix this in H8951 4g Esp 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
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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-2023-49255 in production — separate from our analysis above.

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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