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 17, 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 51× in last 7d / 227× 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 806 total refreshes for this CVE.

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