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Dap 1325 FirmwareOperating system · Dlink

CVE-2023-41205

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 SubnetMask 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-18831.

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 router's HNAP1 SOAP endpoint SetAPLanSettings function. The vulnerability stems from improper length validation of XML data before copying to a fixed-size stack buffer, allowing remote network-adjacent attackers to achieve root-level code execution without authentication.

MitigationApply vendor firmware patch if available; otherwise, isolate affected devices on restricted network segments and block external HNAP/SOAP access via firewall to limit attack surface.

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. Confirm device model is D-Link DAP-1325
    Access the router admin web interface or check the device label/packaging to verify the exact model number
    Affected if The device is not a D-Link DAP-1325 router
  2. Check installed firmware version
    Log into the router web interface (typically at 192.168.0.1) and navigate to Status or Management section to view the firmware version; alternatively, check via CLI if telnet/ssh is enabled
    Affected if The firmware version is lower than 1.09b03 (for example, 1.08 or earlier)
  3. Verify HNAP1 SOAP endpoint is network-accessible
    From a network-adjacent host, attempt to reach the router's HTTP service on common ports (80, 8080) and send a basic SOAP/HNAP request to the /HNAP1 endpoint; use a tool like curl with a probe request
    Affected if The HNAP1 SOAP interface responds to network requests (indicating it is not blocked or disabled)
  4. Confirm SetAPLanSettings function is exposed
    Send a crafted SOAP request to the HNAP1 endpoint calling the SetAPLanSettings action; observe if the router processes the request without authentication
    Affected if The SetAPLanSettings function accepts requests without requiring authentication

A user is affected if they have a D-Link DAP-1325 router running firmware version below 1.09b03 with the HNAP1 SOAP interface accessible on the network.

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 if available; otherwise, isolate affected devices on restricted network segments and block external HNAP/SOAP access via firewall to limit attack surface.

Recommended fix High confidence

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

  1. Access the D-Link DAP-1325 router administration interface via web browser
  2. Navigate to the Administration or System Settings section
  3. Locate the Firmware Upgrade option
  4. Download the latest firmware version 1.09b03 or later from the official D-Link support website (support.dlink.com)
  5. Upload and apply the firmware update following the on-screen instructions
  6. Allow the device to reboot and complete the update process
  7. Verify the firmware version has been updated to 1.09b03 or newer after reboot
Caveat Firmware updates may reset configuration to defaults; backup current settings before upgrading if possible

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

Fix this in Dap 1325 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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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-2023-41205 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