---
id: CVE-2026-71958
title: >-
  D-Link DWR-M961 devices with hardware version C1 and software version
  1.1.2_C1_202602110044 contain a buffer overflow vulnerability in the
  quicksetup.cgi interface
summary: >-
  D-Link DWR-M961 devices with hardware version C1 and software version
  1.1.2_C1_202602110044 contain a buffer overflow vulnerability in the
  quicksetup.cgi interface. A remote attacker can write overly long strings to
  the test4, ssid2, and…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-120
published: '2026-08-08'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71958'
references:
  - url: >-
      https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10512
    label: disclosure@vulncheck.com
  - url: >-
      https://www.dlink.com/middle-east/en/products/dwr-m961-4g-ac1200-lte-router
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/d-link-dwr-m961-buffer-overflow-via-quicksetup-cgi
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-09T07:33:01.030Z'
epss: 0.01072
epssPercentile: 0.63456
---

## Overview

D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044 contain a buffer overflow vulnerability in the quicksetup.cgi interface. A remote attacker can write overly long strings to the test4, ssid2, and username fields and execute arbitrary commands by crafting a specific payload, or cause the device to crash.

## Remediation

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