---
id: CVE-2026-90680
title: A security flaw has been discovered in D-Link DIR-823G 1.0.2B05_20181207
summary: >-
  A security flaw has been discovered in D-Link DIR-823G 1.0.2B05_20181207. The
  impacted element is the function strcpy of the file
  /HNAP1/SetStaticRouteSettings of the component HNAP1. The manipulation of the
  argument PAddress/SubnetMask/…
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: DIR-823G
affected:
  - DIR-823G 1.0.2B05_20181207
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:35.580'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90680'
references:
  - url: >-
      https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-823g/SetStaticRouteSettings/README.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90680'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/914902'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403213'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403213/cti'
    label: cna@vuldb.com
  - url: 'https://www.dlink.com/'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T14:43:23.776615Z'
epss: 0.00511
epssPercentile: 0.42592
ingestedAt: '2026-09-14T15:23:07.466Z'
---

## Overview

A security flaw has been discovered in D-Link DIR-823G 1.0.2B05_20181207. The impacted element is the function strcpy of the file /HNAP1/SetStaticRouteSettings of the component HNAP1. The manipulation of the argument PAddress/SubnetMask/Gateway results in stack-based buffer overflow. The attack can be launched remotely.

## Remediation

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