CVE-2025-66644

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 2025-12-08), 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: 3%CVSS: 9.8Exploit: cisa kev · ssvc activeExposed: 0

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

Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
84(Attend)
EG Risk 84/100SSVC: Attend

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%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
3%
EPSS %ILE
88%
KEV
⚠ Exploited

Published

December 5, 2025

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Sep 20, 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-2025-66644
generic

Array Support on X: "Array OS release 9.4.5.9 for the Array AG 1000 series is now available for download. (link: https://t.co/SNWV8QNXRO)" / X

https://x.com/ArraySupport/status/1921373397533032590
generic

Array Networks Array AGシリーズにおけるコマンドインジェクションの脆弱性に関する注意喚起

https://www.jpcert.or.jp/at/2025/at250024.html
generic🔴 Active Exploitation

Hackers are exploiting ArrayOS AG VPN flaw to plant webshells

https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-arrayos-ag-vpn-flaw-to-plant-webshells/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 55× in last 7d / 246× 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 933 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2025-66644?
CVE-2025-66644 is a critical vulnerability published on December 5, 2025. Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
When was CVE-2025-66644 disclosed?
CVE-2025-66644 was first published in the National Vulnerability Database on December 5, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-66644 actively exploited?
Yes. CISA added CVE-2025-66644 to the Known Exploited Vulnerabilities catalog on December 8, 2025, affecting Array Networks ArrayOS AG. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-66644?
CVE-2025-66644 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2025-66644?
CVE-2025-66644 affects Array Networks ArrayOS AG. 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-2025-66644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-66644, 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.

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