CVE-2021-45382

dlink dir-820l firmware, dlink dir-820lw firmware, dlink dir-826l firmware

Published 17 Feb 2022 · updated 17 Jun 2026 · Analyzed

9.8 Critical · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 4 Apr 2022, with a remediation deadline of 25 Apr 2022 for US federal agencies.

Required action: The impacted product is end-of-life and should be disconnected if still in use.

Description

A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

References

github.com/doudoudedi/D-LINK_Command_Injection1/blob/main/D-LINK_Command_injection.md · Exploit, Third Party Advisory
supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10264 · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45382 · US Government Resource