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ExploitedIn CISA KEV

CVE-2021-45382

Exploitation confirmed. First attested on 2022-04-04 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2022-02-17
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-02-1721:15CVE publishedNVD
  2. 2022-04-04Added to the CISA KEV catalogCISA KEV
  3. 2022-04-04Listed as exploited by GCVEGCVE
  4. 2022-04-04Exploitation first reportedCISA KEV
  5. 2025-01-2920:55SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-45382?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-45382?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Dlink dir-810l firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Dlink dir-820l firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Dlink dir-820lw firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. CISA’s required action: The impacted product is end-of-life and should be disconnected if still in use.due 2022-04-25

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-04-04
Patch Due Date
2022-04-25
Ransomware Use
Unknown
Required Action
The impacted product is end-of-life and should be disconnected if still in use.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-02-17
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-5wgx-qvpv-2353

Frequently asked questions

What is CVE-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 reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

Is CVE-2021-45382 actively exploited?

Yes. CVE-2021-45382 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-04-25.

What is the CVSS score for CVE-2021-45382?

CVE-2021-45382 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record