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Vulnerabilities

Vulnerability · CVE-2021-45382

D-Link Multiple Routers Remote Code Execution Vulnerability

Published Feb 17, 2022 · catalog updated Jun 16, 2026 · D-Link Multiple Routers

Patch now

CVE-2021-45382 is in the CISA known-exploited catalog, due Apr 25, 2022. Confirm D-Link Multiple Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
97.84%
Remediation
Remediation guidance
Affected products
cpe dlink/dir-810l firmware · cpe dlink/dir-820l firmware · cpe dlink/dir-820lw firmware · cpe dlink/dir-826l firmware · cpe dlink/dir-830l firmware · cpe dlink/dir-836l firmware

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe dlink/dir-810l firmwareversion unspecified
  • cpe dlink/dir-820l firmwareversion unspecified
  • cpe dlink/dir-820lw firmwareversion unspecified
  • cpe dlink/dir-826l firmwareversion unspecified
  • cpe dlink/dir-830l firmwareversion unspecified
  • cpe dlink/dir-836l firmwareversion unspecified
  • vendor D-Link Multiple Routersversion unspecified

How to fix CVE-2021-45382

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-45382 is in the CISA known-exploited catalog, due Apr 25, 2022. Confirm D-Link Multiple Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. The impacted product is end-of-life and should be disconnected if still in use.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 97.84%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 17, 2022 · Catalog

    Detected

    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.

  2. Apr 4, 2022 · CISA KEV

    Known exploited

    The impacted product is end-of-life and should be disconnected if still in use.

  3. Apr 25, 2022 · CISA KEV

    Remediation due

    The impacted product is end-of-life and should be disconnected if still in use.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-45382

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-45382

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-45382

    30-day exploitation probability 97.8%

    first.org
  • NIST NVDVulnerability recordCVE-2021-45382

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-45382

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.