CVE-2021-27249

Name: CVE-2021-27249
Creator: NVD / NIST
Published: 2021-04-14T16:15:13.453+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 5.09%

Last modified Jun 17, 2026

CVE-2021-27249 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 v1.01rc001 Wi-Fi access points. Authentication is not required to exploit this vulnerability. EPSS estimates a 5.09% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 v1.01rc001 Wi-Fi access points. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of CGI scripts. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11369.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.09%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions	Update
Dlink	Dap-2020 Firmware	1.01	Rc001

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-204/Third Party Advisory, VDB Entry
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-204/Third Party Advisory, VDB Entry

Timeline

Published: Apr 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27249?

How severe is CVE-2021-27249?

CVE-2021-27249 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27249?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27249?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST