Vulnerability details
CVE-2025-66644
Actively exploited
Array Networks ArrayOS AG
CVSS 3.1
7.2High
Remedy
Required action (CISA): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due: 2025-12-29)
Versions not listed as affected in the CVE record:
- ArrayOS AG — version 9.4.5.9 and later
Official description
Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.2High | 3.1 | CVEProject cvelistV5 (CNA) (mitre) | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Array Networks | ArrayOS AG | v < 9.4.5.9 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://www.jpcert.or.jp/at/2025/at250024.html
- https://x.com/ArraySupport/status/1921373397533032590
- https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-arrayos-ag-vpn-flaw-to-plant-webshells/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644 government-resource
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Details
- Published
- 2025-12-05
- Last updated
- 2026-02-26
- State
- Published
- Assigner (CNA)
- mitre
- Kolun priority
- 73 · High
CISA KEV catalog
- Date added
- 2025-12-08
- Due date
- 2025-12-29
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
3.33%
Probability of exploitation in 30 days
88.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')