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CVE-2021-33274

9.8 · CRITICAL

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were discovered to contain a stack buffer overflow vulnerability in the function FUN_80040af8 in /formWlanSetup.

Published Dec 1, 2021CWE-787EPSS 3.96%

Overview

CVE-2021-33274 is a critical-severity vulnerability. It was published on December 1, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were discovered to contain a stack buffer overflow vulnerability in the function FUN_80040af8 in /formWlanSetup. This vulnerability is triggered via a crafted POST request.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Lnkvct/IoT-poc/tree/master/D-Link-DIR809/vuln07Refwww.dlink.com/en/security-bulletin/GitHubgithub.com/Lnkvct/IoT-poc/tree/master/D-Link-DIR809/vuln07Refwww.dlink.com/en/security-bulletin/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-33274?

CVE-2021-33274 is a critical-severity vulnerability. It was published on December 1, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2021-33274?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-33274?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-33274?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-33274 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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