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Dap 1325 FirmwareOperating system · Dlink

CVE-2023-41204

HIGH · 8.8 CVSS v3.1 Published 2024-05-03
Fix available
A fix is available. Upgrade to 1.09b03 or later.
See remediation →
93/100
Remediation priority · Urgent
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
D-Link DAP-1325 SetAPLanSettings SecondaryDNS Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1325 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of XML data provided to the HNAP1 SOAP endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-18830.

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

Stack-based buffer overflow in D-Link DAP-1325's HNAP1 SOAP endpoint when handling XML data in SetAPLanSettings. The vulnerability stems from insufficient length validation before copying user-supplied data to a fixed-size stack buffer, allowing network-adjacent attackers to achieve root-level code execution without authentication.

MitigationApply vendor firmware patch when available; otherwise segment the device on a restricted VLAN or replace the affected hardware, as the vulnerability is exploitable without credentials and provides root access.

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
Dap 1325 FirmwareOperating system
Affected:< 1.09b03

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
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/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 device's web administration interface or check the device label/menu to confirm the exact model is D-Link DAP-1325
    Affected if The device is not a D-Link DAP-1325 model - this vulnerability only affects that specific device
  2. Check the installed firmware version
    Log into the DAP-1325 web interface and navigate to the firmware/version information page, or use the device's status display to find the firmware version number
    Affected if The firmware version is less than 1.09b03 (for example, 1.08 or earlier versions)
  3. Verify HNAP1 SOAP service is accessible
    Attempt to access the HNAP1 endpoint on the device (typically at /HNAP1/ or check if the SOAP service responds to requests on the local network)
    Affected if The HNAP1 SOAP endpoint is reachable from the network and responds to requests - this is the vulnerable service interface
  4. Confirm network exposure of the device
    Determine if the DAP-1325 is placed on a network segment accessible to untrusted users - check if the device management interface is exposed beyond a trusted local network
    Affected if The device is network-adjacent to untrusted users (e.g., on a shared or guest network segment, or directly internet-exposed)

You are affected if you have a D-Link DAP-1325 device running firmware version 1.09b03 or lower, and the HNAP1 SOAP service is accessible from a network segment where untrusted users can reach it.

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 1.09b03 or later
Fixed in 1.09b03
Interim mitigation

Apply vendor firmware patch when available; otherwise segment the device on a restricted VLAN or replace the affected hardware, as the vulnerability is exploitable without credentials and provides root access.

Recommended fix Moderate confidence

D-Link DAP-1325 Firmware version 1.09b03 or later

  1. Check your D-Link DAP-1325 router's current firmware version in the administrative web interface (typically at 192.168.0.1)
  2. Navigate to the firmware update or administration section
  3. Download the latest firmware version 1.09b03 or later from D-Link's official support website (supportannouncement.us.dlink.com)
  4. Upload and apply the firmware update through the router's web interface
  5. Verify the firmware version has been updated to 1.09b03 or later after reboot
Caveat Standard firmware upgrade - backup configuration if custom settings are in place; router will reboot during update

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

Fix this in Dap 1325 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-2023-41204 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