CVE-2021-45382

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-04-04), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 98%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
98%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

February 17, 2022

Last Modified

November 10, 2025

Advisory Details (3)

Auto-updated Sep 3, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45382
generic

D-Link Technical Support

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10264
generic

D-LINK_Command_Injection1/D-LINK_Command_injection.md at main · doudoudedi/D-LINK_Command_Injection1 · GitHub

https://github.com/doudoudedi/D-LINK_Command_Injection1/blob/main/D-LINK_Command_injection.md

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 56× in last 7d / 226× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 718 total refreshes for this CVE.

  1. 2026-09-08 12:05 UTCGHSA enrichment
  2. 2026-09-08 08:19 UTCGHSA enrichment
  3. 2026-09-08 04:34 UTCGHSA enrichment
  4. 2026-09-08 00:48 UTCGHSA enrichment
  5. 2026-09-07 21:03 UTCGHSA enrichment
  6. 2026-09-07 17:19 UTCEG score recompute
  7. 2026-09-07 17:19 UTCGHSA enrichment
  8. 2026-09-07 15:58 UTCEPSS rescore
  9. 2026-09-07 13:34 UTCGHSA enrichment
  10. 2026-09-07 09:45 UTCGHSA enrichment
  11. 2026-09-07 06:00 UTCGHSA enrichment
  12. 2026-09-07 02:15 UTCGHSA enrichment
  13. 2026-09-06 22:28 UTCGHSA enrichment
  14. 2026-09-06 18:43 UTCGHSA enrichment
  15. 2026-09-06 14:58 UTCEG score recompute
  16. 2026-09-06 14:58 UTCGHSA enrichment
  17. 2026-09-06 13:45 UTCEPSS rescore
  18. 2026-09-06 11:12 UTCGHSA enrichment
  19. 2026-09-06 07:26 UTCGHSA enrichment
  20. 2026-09-06 03:40 UTCGHSA enrichment
  21. 2026-09-05 23:55 UTCGHSA enrichment
  22. 2026-09-05 20:10 UTCGHSA enrichment
  23. 2026-09-05 16:26 UTCGHSA enrichment
  24. 2026-09-05 12:40 UTCGHSA enrichment
  25. 2026-09-05 08:54 UTCGHSA enrichment
Show 75 more
  1. 2026-09-05 05:09 UTCGHSA enrichment
  2. 2026-09-05 01:22 UTCGHSA enrichment
  3. 2026-09-04 21:37 UTCGHSA enrichment
  4. 2026-09-04 17:52 UTCGHSA enrichment
  5. 2026-09-04 17:38 UTCCISA KEV update
  6. 2026-09-04 14:06 UTCEG score recompute
  7. 2026-09-04 14:06 UTCGHSA enrichment
  8. 2026-09-04 13:57 UTCEPSS rescore
  9. 2026-09-04 10:20 UTCGHSA enrichment
  10. 2026-09-04 06:34 UTCEG score recompute
  11. 2026-09-04 06:33 UTCGHSA enrichment
  12. 2026-09-04 05:03 UTCEPSS rescore
  13. 2026-09-04 02:45 UTCGHSA enrichment
  14. 2026-09-03 23:00 UTCGHSA enrichment
  15. 2026-09-03 19:13 UTCGHSA enrichment
  16. 2026-09-03 15:28 UTCGHSA enrichment
  17. 2026-09-03 11:40 UTCGHSA enrichment
  18. 2026-09-03 07:53 UTCGHSA enrichment
  19. 2026-09-03 04:08 UTCGHSA enrichment
  20. 2026-09-03 00:20 UTCGHSA enrichment
  21. 2026-09-02 20:34 UTCGHSA enrichment
  22. 2026-09-02 17:33 UTCCISA KEV update
  23. 2026-09-02 16:49 UTCGHSA enrichment
  24. 2026-09-02 13:04 UTCGHSA enrichment
  25. 2026-09-02 09:19 UTCGHSA enrichment
  26. 2026-09-02 05:34 UTCGHSA enrichment
  27. 2026-09-02 01:48 UTCGHSA enrichment
  28. 2026-09-01 22:03 UTCGHSA enrichment
  29. 2026-09-01 18:19 UTCGHSA enrichment
  30. 2026-09-01 14:34 UTCEG score recompute
  31. 2026-09-01 14:33 UTCGHSA enrichment
  32. 2026-09-01 13:50 UTCEPSS rescore
  33. 2026-09-01 10:46 UTCGHSA enrichment
  34. 2026-09-01 07:01 UTCGHSA enrichment
  35. 2026-09-01 03:15 UTCGHSA enrichment
  36. 2026-08-31 23:28 UTCGHSA enrichment
  37. 2026-08-31 19:43 UTCGHSA enrichment
  38. 2026-08-31 15:58 UTCGHSA enrichment
  39. 2026-08-31 14:19 UTCCISA KEV update
  40. 2026-08-31 12:11 UTCGHSA enrichment
  41. 2026-08-31 08:24 UTCGHSA enrichment
  42. 2026-08-31 04:39 UTCGHSA enrichment
  43. 2026-08-31 00:54 UTCGHSA enrichment
  44. 2026-08-30 21:09 UTCEG score recompute
  45. 2026-08-30 21:09 UTCGHSA enrichment
  46. 2026-08-30 19:14 UTCEPSS rescore
  47. 2026-08-30 19:14 UTCEPSS rescore
  48. 2026-08-30 17:24 UTCGHSA enrichment
  49. 2026-08-30 13:39 UTCGHSA enrichment
  50. 2026-08-30 09:53 UTCGHSA enrichment
  51. 2026-08-30 06:08 UTCGHSA enrichment
  52. 2026-08-30 02:23 UTCGHSA enrichment
  53. 2026-08-29 22:38 UTCGHSA enrichment
  54. 2026-08-29 18:53 UTCGHSA enrichment
  55. 2026-08-29 15:09 UTCGHSA enrichment
  56. 2026-08-29 11:23 UTCGHSA enrichment
  57. 2026-08-29 07:37 UTCGHSA enrichment
  58. 2026-08-29 03:50 UTCGHSA enrichment
  59. 2026-08-29 00:04 UTCEG score recompute
  60. 2026-08-29 00:04 UTCGHSA enrichment
  61. 2026-08-28 21:37 UTCEPSS rescore
  62. 2026-08-28 20:16 UTCGHSA enrichment
  63. 2026-08-28 16:31 UTCGHSA enrichment
  64. 2026-08-28 12:45 UTCGHSA enrichment
  65. 2026-08-28 08:57 UTCGHSA enrichment
  66. 2026-08-28 05:11 UTCGHSA enrichment
  67. 2026-08-28 01:25 UTCGHSA enrichment
  68. 2026-08-27 21:40 UTCGHSA enrichment
  69. 2026-08-27 17:55 UTCGHSA enrichment
  70. 2026-08-27 17:22 UTCCISA KEV update
  71. 2026-08-27 14:09 UTCGHSA enrichment
  72. 2026-08-27 10:24 UTCGHSA enrichment
  73. 2026-08-27 06:39 UTCGHSA enrichment
  74. 2026-08-27 02:54 UTCGHSA enrichment
  75. 2026-08-26 23:10 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2021/CVE-2021-45382.yaml
    First seen Jan 1, 2021

    D-Link - Remote Command Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-45382?
CVE-2021-45382 is a critical vulnerability published on February 17, 2022. 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…
When was CVE-2021-45382 disclosed?
CVE-2021-45382 was first published in the National Vulnerability Database on February 17, 2022, with the most recent update on November 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-45382 actively exploited?
Yes. CISA added CVE-2021-45382 to the Known Exploited Vulnerabilities catalog on April 4, 2022, affecting D-Link Multiple Routers. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-45382?
CVE-2021-45382 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2021-45382?
CVE-2021-45382 affects D-Link Multiple Routers. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-45382?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45382, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2021-45382

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