CVE-2025-66644
CriticalExploitedPublic exploitArray Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
Published Dec 5, 2025 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2025-66644 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting ArrayOS AG (Arraynetworks).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 5, 2025. Public exploit code is available.
- EPSS estimates a 3.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including ArrayOS AG 9.4.5.9.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
3.4%
Higher than 88.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-66644 brief as a PDF
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Description
Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 8, 2025 | Dec 29, 2025 | Not reported |
| Industry KEV feed | Dec 5, 2025 | Dec 29, 2025 | Not reported |
| CIRCL KEV | Dec 8, 2025 | Dec 29, 2025 | Not reported |
| ENISA EUVD | Dec 8, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ArrayOS AGArraynetworks | See advisory | 9.4.5.9 |
Patched Releases
ArrayOS AG
9.4.5.9
Timeline
Publicly disclosed
Dec 5, 2025
Added to Industry KEV feed
Dec 5, 2025
Added to CISA KEV
Dec 8, 2025
Added to CIRCL KEV
Dec 8, 2025
Added to ENISA EUVD
Dec 8, 2025
Last updated
Feb 26, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryVulnCheck exploitation report
- advisoryhttps://x.com/ArraySupport/status/1921373397533032590
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
Affected: ArrayOS AG (Arraynetworks). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 5, 2025.
Yes. It was added on Dec 8, 2025 with a federal remediation due date of Dec 29, 2025.
Public exploit code is available.
Fixed versions are available, including ArrayOS AG 9.4.5.9.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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