What’s Vulnerable › Vulnerabilities

CVE-2025-66644: Array Networks ArrayOS AG OS Command Injection Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-12-08
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-05 · updated 2026-06-17
• Weakness: CWE-78

Description

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

Affected products

• Array Networks ArrayOS AG: before 9.4.5.9 — fixed in 9.4.5.9

How to fix

Upgrade to a fixed version: Array Networks ArrayOS AG 9.4.5.9. Check the vendor advisory for mitigations.

References

• https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-arrayos-ag-vpn-flaw-to-plant-webshells/
• https://www.jpcert.or.jp/at/2025/at250024.html
• https://x.com/ArraySupport/status/1921373397533032590
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644

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