CVE-2021-27249

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.

• CWE-78

• 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

Published

Apr 14, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-27243This vulnerability allows local attackers to escalate privil…8.8
• CVE-2021-27244This vulnerability allows local attackers to disclose sensit…6.5
• CVE-2021-27245This vulnerability allows a firewall bypass on affected inst…8.1
• CVE-2021-27246This vulnerability allows network-adjacent attackers to exec…8
• CVE-2021-27247This vulnerability allows remote attackers to disclose sensi…6.5
• CVE-2021-27248This vulnerability allows network-adjacent attackers to exec…8.8
• CVE-2021-27250This vulnerability allows network-adjacent attackers to disc…6.5
• CVE-2021-27251This vulnerability allows network-adjacent attackers to exec…8.8
• CVE-2021-27252This vulnerability allows network-adjacent attackers to exec…8.8
• CVE-2021-27253This vulnerability allows network-adjacent attackers to exec…8.8
• CVE-2021-27254This vulnerability allows network-adjacent attackers to bypa…8.8
• CVE-2021-27255This vulnerability allows remote attackers to execute arbitr…8.8