Vulnerability record · CVE-2021-27249 · published 14 April 2021

CVE-2021-27249: Dlink dap-2020 firmware os command injection vulnerability

Dlink · Dap 2020 Firmware

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.

8.8 CVSS 3.1 High EPSS 5.1% · top 7.9% CWE-78 · OS command injection

8.8CVSS 3.1 base score, v2 8.3

5.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Dap 2020 Firmware Dlink

References

Link	Tags
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201	PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-204/	Third Party AdvisoryVDB Entry
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201	PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-204/	Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2021-27249), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.