CVE-2021-39509

critical

Description

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.

References

https://www.dlink.com/en/security-bulletin/

https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.md

https://github.com/doudoudedi/main-DIR-816_A2_Command-injection

Details

Source: Mitre, NVD

Published: 2021-08-24

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.05099