CVEs / CVE-2021-45382

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

Known exploited in the CISA KEV catalog since 4 Apr 2022
critical 9.8 CVSS 3.1 (NVD)
EPSS 97.8% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

A remote code execution vulnerability exists in all series H/W revisions routers via the DDNS function in ncc2 binary file.
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 17 Feb 2022 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

Exploitation

In CISA KEV since	4 Apr 2022
Due date for US federal agencies	25 Apr 2022
Used in ransomware campaigns	Unknown
Required action	The impacted product is end-of-life and should be disconnected if still in use.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-78

References

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

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.