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H8951 4g Esp FirmwareOperating system · Hongdian

CVE-2023-49254

HIGH · 8.8 CVSS v3.1 Published 2024-01-12
Fix available
A fix is available. Upgrade to 2310271149 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable 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
Authenticated user can execute arbitrary commands in the context of the root user by providing payload in the "destination" field of the network test tools. This is similar to the vulnerability CVE-2021-28151 mitigated on the user interface level by blacklisting characters with JavaScript, however, it can still be exploited by sending POST requests directly.

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

Authenticated users can execute arbitrary commands as root by injecting payloads into the 'destination' field of network test tools. This vulnerability bypasses a previous mitigation (CVE-2021-28151) that only enforced client-side JavaScript blacklist filtering, as the attack can be carried out by sending direct POST requests to bypass client-side controls.

MitigationImplement server-side input validation and sanitization; avoid direct use of user-supplied input in shell commands by employing parameterized approaches or whitelist validation for the destination field.

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/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 device web interface or check device labeling to confirm it is a Hongdian H8951 4g Esp device
    Affected if The device is not a Hongdian H8951 4g model
  2. Check the firmware version
    Access the device web interface system settings or use the command line to retrieve the firmware version, then compare it against the affected version 2310271149
    Affected if Firmware version is lower than 2310271149 (e.g., versions before the 2310271149 build)
  3. Verify network test tool access
    Locate the network test or diagnostic tools section in the device web interface (often under System Tools, Network Diagnostics, or similar)
    Affected if Network test tool functionality is present and accessible to authenticated users
  4. Check for client-side only filtering
    Examine the web interface JavaScript code for the network test feature. Look for client-side blacklist filtering in JavaScript that validates the destination field
    Affected if Only client-side JavaScript blacklist filtering exists without server-side input validation on the destination field
  5. Confirm direct POST request capability
    Send a direct HTTP POST request to the network test endpoint (if known) with a test payload in the destination parameter, bypassing the web interface JavaScript
    Affected if The device accepts and processes direct POST requests to the network test endpoint without additional server-side validation

A user is affected if they have a Hongdian H8951 4g device running firmware below version 2310271149 and the network test tool feature is accessible to authenticated users with only client-side filtering 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

Implement server-side input validation and sanitization; avoid direct use of user-supplied input in shell commands by employing parameterized approaches or whitelist validation for the destination field.

Recommended fix High confidence

H8951 4g Esp Firmware version 2310271149 or later

  1. 1. Obtain the latest firmware version 2310271149 or later from the device manufacturer's official support portal.
  2. 2. Authenticate to the H8951 4g Esp router web interface with administrator credentials.
  3. 3. Navigate to the firmware upgrade section (typically under Administration, System, or Maintenance settings).
  4. 4. Upload the firmware file and initiate the upgrade process.
  5. 5. Wait for the device to reboot and verify the upgrade was successful by checking the firmware version in the web interface.
  6. 6. Confirm the vulnerability is remediated by testing that command injection characters (; | ` $ etc.) are properly sanitized in the network test tools destination field.
Caveat Firmware upgrades may reset device configuration to defaults; backup current settings before upgrading and reapply after upgrade if needed

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
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,290
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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-2023-49254 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