CVE-2021-39510
CRITICALD-Link DIR-816 A1 FW101CNB04 - OS Command Injection via form2userconfig.cgi Username Parameter
Title source: llmDescription
An issue was discovered in D-Link DIR816_A1_FW101CNB04 750m11ac wireless router, 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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_misc
https://www.dlink.com/en/security-bulletin/
Exploit, Third Party Advisory x_refsource_misc
https://github.com/doudoudedi/main-DIR-816_A1_Command-injection/blob/main/injection_A1.md
Third Party Advisory x_refsource_misc
https://github.com/doudoudedi/main-DIR-816_A1_Command-injection
Scores
CVSS v3
9.8
EPSS
0.0862
EPSS Percentile
94.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-77
Status
published
Products (1)
dlink/dir-816_firmware
101cnb04
Published
Aug 24, 2021
Tracked Since
Feb 18, 2026