---
id: CVE-2021-33259
title: >-
  Several web interfaces in D-Link DIR-868LW 1.12b have no authentication
  requirements for access, allowing for attackers to obtain users' DNS query
  history.
summary: >-
  Several web interfaces in D-Link DIR-868LW 1.12b have no authentication
  requirements for access, allowing for attackers to obtain users' DNS query
  history.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-306
vendor: d-link
product: dir-868lw_firmware
affected:
  - dir-868lw_firmware = 1.12b
published: '2021-10-31'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-33259'
references:
  - url: >-
      https://github.com/jayus0821/uai-poc/blob/main/D-Link/DIR-868L/webaccess_UAI.md
    label: cve@mitre.org
  - url: 'https://www.dlink.com/en/security-bulletin/'
    label: cve@mitre.org
  - url: 'http://d-link.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://dir-868lw.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/jayus0821/uai-poc/blob/main/D-Link/DIR-868L/webaccess_UAI.md
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.dlink.com/en/security-bulletin/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0179
epssPercentile: 0.77393
ingestedAt: '2026-07-06T01:08:17.047Z'
---

## Overview

Several web interfaces in D-Link DIR-868LW 1.12b have no authentication requirements for access, allowing for attackers to obtain users' DNS query history.

## Affected

- `dir-868lw_firmware = 1.12b`

## Remediation

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