CVE-2021-45382

KEVD-Link Multiple Routers Remote Code Execution Vulnerability

Description

A remote code execution vulnerability exists in all series H/W revisions routers via the DDNS function in ncc2 binary file.

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.

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

PublishedFeb 17, 2022

Last modifiedJun 17, 2026

Added to KEVApr 4, 2022

Remediation dueApr 25, 2022

References

github.com/doudoudedi/D-LINK_Command_Injection1/blob/main/D-LINK_Command_injection.mdExploitThird Party Advisory
supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10264Vendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45382US Government Resource

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Risk assessment · Critical

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1647 days
CVSS: 9.8 CRITICAL
EPSS (30-day exploit probability): 97.8% · top 1% of all CVEs
Weakness: CWE-78
Attack vector: Network, remotely reachable
Preconditions: No privileges and no user interaction

Recommended actions

1.The impacted product is end-of-life and should be disconnected if still in use.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.