CVE-2021-45382

Name: CVE-2021-45382
Creator: NVD / NIST
Published: 2022-02-17T21:15:07.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 97.84%

Last modified Jun 17, 2026

CVE-2021-45382 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 97.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

97.84%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 25, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dir-820l Firmware	All versions
Dlink	Dir-820lw Firmware	All versions
Dlink	Dir-826l Firmware	All versions
Dlink	Dir-830l Firmware	All versions
Dlink	Dir-836l Firmware	All versions
Dlink	Dir-810l Firmware	All versions

References

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

Timeline

Published: Feb 17, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-45382?

How severe is CVE-2021-45382?

CVE-2021-45382 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 97.84% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-45382?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45382?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST