CVE-2021-45382: D-Link Multiple Routers Remote Code Execution Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-04-04. EPSS: 97.8% chance of exploitation in the next 30 days.

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.

Affected products

• D-Link Dir-810l Firmware: affected versions not specified
• D-Link DIR-820L Firmware: affected versions not specified
• D-Link Dir-820lw Firmware: affected versions not specified
• D-Link Dir-826l Firmware: affected versions not specified
• D-Link Dir-830l Firmware: affected versions not specified
• D-Link Dir-836l Firmware: affected versions not specified

Published 2022-02-17. Last modified 2026-06-17.