CVE-2021-39509

An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.

• CWE-77

• https://github.com/doudoudedi/main-DIR-816_A2_Command-injectionThird Party Advisory
• https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.mdExploit, Third Party Advisory
• https://www.dlink.com/en/security-bulletin/Vendor Advisory
• https://github.com/doudoudedi/main-DIR-816_A2_Command-injectionThird Party Advisory
• https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.mdExploit, Third Party Advisory
• https://www.dlink.com/en/security-bulletin/Vendor Advisory

Published

Aug 24, 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.
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