---
id: CVE-2026-91001
title: A security flaw has been discovered in D-Link DI-8400 16.07
summary: >-
  A security flaw has been discovered in D-Link DI-8400 16.07. This affects the
  function ddns_asp of the file /ddns.asp of the component DDNS Configuration.
  Performing a manipulation of the argument serv/user/host/wild/mx/bmx/cust/ip
  resul…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-121
vendor: D-Link
product: DI-8400
affected:
  - DI-8400 16.07
published: '2026-09-15'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T15:17:30.983'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91001'
references:
  - url: 'https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/ddns_asp/ddns_asp.py'
    label: cna@vuldb.com
  - url: 'https://github.com/Vivi-Xray/Xray-s-cve-/tree/main/ddns_asp'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-91001'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/931642'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403582'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403582/cti'
    label: cna@vuldb.com
  - url: 'https://www.dlink.com/'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0093
epssPercentile: 0.58971
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-15T13:59:05.976699Z'
ingestedAt: '2026-09-15T06:32:35.356Z'
---

## Overview

A security flaw has been discovered in D-Link DI-8400 16.07. This affects the function ddns_asp of the file /ddns.asp of the component DDNS Configuration. Performing a manipulation of the argument serv/user/host/wild/mx/bmx/cust/ip results in stack-based buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.