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 Jul 28, 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 37× in last 7d / 203× 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 411 total refreshes for this CVE.

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