CVE-2020-25506

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 2021-11-03), 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
Exploited 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: 100%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.

D-Link DNS-320 FW v2.06B01 Revision Ax is affected by command injection in the system_mgr.cgi component, which can lead to remote arbitrary code execution.

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
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

February 2, 2021

Last Modified

November 7, 2025

Advisory Details (4)

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-2020-25506
generic

Security Bulletin | D-Link

https://www.dlink.com/en/security-bulletin/
generic

D-Link Technical Support

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10183
generic

Disclosure of vulnerabilities in D-LInk DNS320 · GitHub

https://gist.github.com/WinMin/6f63fd1ae95977e0e2d49bd4b5f00675

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 47× in last 7d / 209× 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 761 total refreshes for this CVE.

  1. 2026-09-19 20:48 UTCGHSA enrichment
  2. 2026-09-19 16:58 UTCGHSA enrichment
  3. 2026-09-19 13:06 UTCGHSA enrichment
  4. 2026-09-19 09:16 UTCGHSA enrichment
  5. 2026-09-19 05:25 UTCGHSA enrichment
  6. 2026-09-19 01:35 UTCGHSA enrichment
  7. 2026-09-18 21:45 UTCGHSA enrichment
  8. 2026-09-18 19:20 UTCCISA KEV update
  9. 2026-09-18 17:55 UTCGHSA enrichment
  10. 2026-09-18 14:15 UTCCISA KEV update
  11. 2026-09-18 14:05 UTCGHSA enrichment
  12. 2026-09-18 10:14 UTCGHSA enrichment
  13. 2026-09-18 06:24 UTCGHSA enrichment
  14. 2026-09-18 02:34 UTCGHSA enrichment
  15. 2026-09-17 22:43 UTCGHSA enrichment
  16. 2026-09-17 18:50 UTCGHSA enrichment
  17. 2026-09-17 14:56 UTCGHSA enrichment
  18. 2026-09-17 11:06 UTCGHSA enrichment
  19. 2026-09-17 07:16 UTCGHSA enrichment
  20. 2026-09-17 03:26 UTCGHSA enrichment
  21. 2026-09-16 23:35 UTCGHSA enrichment
  22. 2026-09-16 19:44 UTCGHSA enrichment
  23. 2026-09-16 15:54 UTCGHSA enrichment
  24. 2026-09-16 14:10 UTCCISA KEV update
  25. 2026-09-16 12:04 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 08:13 UTCGHSA enrichment
  2. 2026-09-16 04:21 UTCGHSA enrichment
  3. 2026-09-16 00:31 UTCGHSA enrichment
  4. 2026-09-15 20:37 UTCGHSA enrichment
  5. 2026-09-15 16:37 UTCGHSA enrichment
  6. 2026-09-15 12:47 UTCGHSA enrichment
  7. 2026-09-15 08:57 UTCGHSA enrichment
  8. 2026-09-15 05:06 UTCGHSA enrichment
  9. 2026-09-15 01:15 UTCGHSA enrichment
  10. 2026-09-14 21:25 UTCGHSA enrichment
  11. 2026-09-14 19:24 UTCCISA KEV update
  12. 2026-09-14 17:35 UTCGHSA enrichment
  13. 2026-09-14 13:45 UTCGHSA enrichment
  14. 2026-09-14 09:54 UTCGHSA enrichment
  15. 2026-09-14 06:03 UTCGHSA enrichment
  16. 2026-09-14 02:13 UTCGHSA enrichment
  17. 2026-09-13 22:23 UTCGHSA enrichment
  18. 2026-09-13 18:33 UTCGHSA enrichment
  19. 2026-09-13 14:42 UTCGHSA enrichment
  20. 2026-09-13 10:48 UTCGHSA enrichment
  21. 2026-09-13 06:57 UTCGHSA enrichment
  22. 2026-09-13 03:08 UTCGHSA enrichment
  23. 2026-09-12 23:18 UTCGHSA enrichment
  24. 2026-09-12 19:27 UTCGHSA enrichment
  25. 2026-09-12 15:38 UTCGHSA enrichment
  26. 2026-09-12 11:48 UTCGHSA enrichment
  27. 2026-09-12 07:58 UTCGHSA enrichment
  28. 2026-09-12 04:07 UTCGHSA enrichment
  29. 2026-09-12 00:17 UTCGHSA enrichment
  30. 2026-09-11 20:27 UTCGHSA enrichment
  31. 2026-09-11 18:49 UTCCISA KEV update
  32. 2026-09-11 16:37 UTCGHSA enrichment
  33. 2026-09-11 12:46 UTCGHSA enrichment
  34. 2026-09-11 08:55 UTCGHSA enrichment
  35. 2026-09-11 05:05 UTCGHSA enrichment
  36. 2026-09-11 01:15 UTCGHSA enrichment
  37. 2026-09-10 21:25 UTCGHSA enrichment
  38. 2026-09-10 19:28 UTCCISA KEV update
  39. 2026-09-10 17:35 UTCGHSA enrichment
  40. 2026-09-10 13:45 UTCGHSA enrichment
  41. 2026-09-10 09:54 UTCEG score recompute
  42. 2026-09-10 09:54 UTCGHSA enrichment
  43. 2026-09-10 09:29 UTCEPSS rescore
  44. 2026-09-10 06:03 UTCGHSA enrichment
  45. 2026-09-10 02:09 UTCGHSA enrichment
  46. 2026-09-09 22:18 UTCGHSA enrichment
  47. 2026-09-09 19:08 UTCCISA KEV update
  48. 2026-09-09 18:25 UTCGHSA enrichment
  49. 2026-09-09 14:34 UTCGHSA enrichment
  50. 2026-09-09 10:43 UTCGHSA enrichment
  51. 2026-09-09 06:52 UTCGHSA enrichment
  52. 2026-09-09 03:02 UTCGHSA enrichment
  53. 2026-09-08 23:12 UTCGHSA enrichment
  54. 2026-09-08 19:22 UTCGHSA enrichment
  55. 2026-09-08 18:54 UTCCISA KEV update
  56. 2026-09-08 15:28 UTCGHSA enrichment
  57. 2026-09-08 11:31 UTCGHSA enrichment
  58. 2026-09-08 07:39 UTCGHSA enrichment
  59. 2026-09-08 03:48 UTCGHSA enrichment
  60. 2026-09-07 23:57 UTCGHSA enrichment
  61. 2026-09-07 20:07 UTCGHSA enrichment
  62. 2026-09-07 16:16 UTCGHSA enrichment
  63. 2026-09-07 12:26 UTCGHSA enrichment
  64. 2026-09-07 08:31 UTCGHSA enrichment
  65. 2026-09-07 04:40 UTCGHSA enrichment
  66. 2026-09-07 00:49 UTCGHSA enrichment
  67. 2026-09-07 00:48 UTCGHSA enrichment
  68. 2026-09-06 20:57 UTCGHSA enrichment
  69. 2026-09-06 17:06 UTCGHSA enrichment
  70. 2026-09-06 13:13 UTCGHSA enrichment
  71. 2026-09-06 09:23 UTCGHSA enrichment
  72. 2026-09-06 05:33 UTCGHSA enrichment
  73. 2026-09-06 01:43 UTCGHSA enrichment
  74. 2026-09-05 21:50 UTCGHSA enrichment
  75. 2026-09-05 17:59 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/2020/CVE-2020-25506.yaml
    First seen Jan 1, 2020

    D-Link DNS-320 - Unauthenticated Remote Code Execution

    Open source ↗

Frequently asked(6)

What is CVE-2020-25506?
CVE-2020-25506 is a critical vulnerability published on February 2, 2021. D-Link DNS-320 FW v2.06B01 Revision Ax is affected by command injection in the system_mgr.cgi component, which can lead to remote arbitrary code execution.
When was CVE-2020-25506 disclosed?
CVE-2020-25506 was first published in the National Vulnerability Database on February 2, 2021, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-25506 actively exploited?
Yes. CISA added CVE-2020-25506 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting D-Link DNS-320 Device. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-25506?
CVE-2020-25506 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-25506?
CVE-2020-25506 affects D-Link DNS-320 Device. 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-2020-25506?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-25506, 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-2020-25506

Explore →

Is Your Infrastructure Affected by CVE-2020-25506?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs