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CVE-2021-45382

D-Link Multiple Routers Remote Code Execution

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 97.8%
  1. Published17 Feb 2022
  2. Added to CISA KEV4 Apr 2022
  3. Remediation due25 Apr 2022
Actively exploited (CISA KEV)

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

Added to KEV: 4 Apr 2022Federal remediation due: 25 Apr 2022

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

D-Link Dir-810l Firmwareall versions
D-Link Dir-820l Firmwareall versions
D-Link Dir-820lw Firmwareall versions
D-Link Dir-826l Firmwareall versions
D-Link Dir-830l Firmwareall versions
D-Link Dir-836l Firmwareall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2021-45382 being actively exploited?

Yes. CVE-2021-45382 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Apr 2022.

How severe is CVE-2021-45382?

CVE-2021-45382 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 97.8% probability of exploitation.

Which products are affected by CVE-2021-45382?

Affected products include D-Link Dir-810l Firmware, D-Link Dir-820l Firmware, D-Link Dir-820lw Firmware, D-Link Dir-826l Firmware, D-Link Dir-830l Firmware, and 1 more.

How do I fix CVE-2021-45382?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-45382 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.