Critical 9.8Known exploited (CISA KEV)Published Feb 17, 2022

CVE-2021-45382A 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.

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects dlink dir-820l_firmware and 5 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Apr 4, 2022; federal agencies had to remediate by Apr 25, 2022. Treat that date as your deadline.

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Every CVE for dlink dir-820l_firmware

Exploited in the last 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.

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Added to CISA KEV Apr 4, 2022; federal remediation due Apr 25, 2022The impacted product is end-of-life and should be disconnected if still in use.
EPSS (exploitation in the next 30 days): 97.84% (percentile 100)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

dlink dir-820l_firmware dlink:dir-820l_firmware	all versions	NVD
dlink dir-820lw_firmware dlink:dir-820lw_firmware	all versions	NVD
dlink dir-826l_firmware dlink:dir-826l_firmware	all versions	NVD
dlink dir-830l_firmware dlink:dir-830l_firmware	all versions	NVD
dlink dir-836l_firmware dlink:dir-836l_firmware	all versions	NVD
dlink dir-810l_firmware dlink:dir-810l_firmware	all versions	NVD

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10264x-refsource-misc, vendor-advisory
https://github.com/doudoudedi/D-LINK_Command_Injection1/blob/main/D-LINK_Command_injection.mdx-refsource-misc, exploit, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45382us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.