Provide references for CVE-2021-39509.
Where can I find more information about CVE-2021-39509?
References are available at: 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.