CVE-2025-66644KEV · OVERDUECWE-78

Array Networks ArrayOS AG OS Command Injection Vulnerability

High · published December 5, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.2. It is confirmed in active exploitation. It sits in the 88.8th percentile for exploit probability.

299
days past CISA
deadline
CVSS v3.1
7.2
EPSS
3%
Percentile
88.8
In the wild
Confirmed
What it is

🚨 Command injection vulnerability in Array Networks ArrayOS AG before version 9.4.5.9 has been actively exploited since August 2025! ⚡ Think of it as a restaurant chef who can be tricked into preparing a dish they never intended to serve — the attacker just slips in a secret ingredient and suddenly, the chef is cooking up chaos instead of dinner! An attacker could send malicious commands that the system would execute, potentially giving them control over the device. This could lead to unauthorized access, data manipulation, or even a complete system takeover. The situation is absolutely devastating for your network's security!

Put simply

Think of it as a restaurant chef who can be tricked into preparing a dish they never intended to serve — the attacker just slips in a secret ingredient and suddenly, the chef is cooking up chaos instead of dinner! This vulnerability allows attackers to inject harmful commands into the system's command line, ultimately executing arbitrary commands with the same privileges as the application itself.

What to do

An attacker could send malicious commands that the system would execute, potentially giving them control over the device. This could lead to unauthorized access, data manipulation, or even a complete system takeover. The situation is absolutely devastating for your network's security! Immediate action is required! Ensure you upgrade to ArrayOS AG version 9.4.5.9 or later. Additionally, review your security policies to prevent unauthenticated command execution and monitor your systems for any suspicious activity. You've got this! Implement these fixes and elevate your security hero status! 🛡️

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.03415 · 88.8th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2025-12-05T00:00Z
KEV added
2025-12-08 · due 2025-12-29
EPSS history
Timeline
  • 08 DEC 00:00Z
    Added to CISA KEV — remediate by Dec 29
    kev
  • 05 DEC 00:00Z
    Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025
    cvelistv5