Home/CVE/This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2
CVE

CVE-2021-27249

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2

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.

HIGH · CVSS 8.8 EPSS 0.05801
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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Affected Products & Versions

1
dlink dap-2020 firmwareall versions
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Scoring & Timeline

8.8
HIGH · CVSS v3.1 · zdi-disclosures@trendmicro.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Apr 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-204/Third Party AdvisoryVDB Entry
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