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

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2025-12-08. EPSS: 3.4% chance of exploitation in the next 30 days.

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)

Published 2025-12-05. Last modified 2026-06-17.