---
title: "CVE-2025-66644: Array Networks ArrayOS AG OS Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-66644/
description: "CVE-2025-66644 (Array Networks ArrayOS AG): Exploited in the wild (CISA KEV). Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-12-05
date_modified: 2026-02-26
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-66644"
kev: true
cvss: 7.2
epss: 0.03415
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Array Networks ArrayOS AG. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-12-08, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-12-29 ; treat that as the outer limit, not the target.
- EPSS 3.4% , percentile 89: FIRST’s model estimates a 3.4% chance of exploitation activity in the next 30 days, higher than 89% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.

## What it is

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

## Affected products (CVE record)

- Array Networks ArrayOS AG: < 9.4.5.9

## Severity

- mitre CVSS 3.1: 7.2 `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-12-08; federal due date 2025-12-29. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 3.42% probability of exploitation activity in the next 30 days; percentile 89.

## Sources

- [Listed in CISA KEV notes (support.arraynetworks.net)](https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/ag.html)
- [Listed in CISA KEV notes (jpcert.or.jp)](https://www.jpcert.or.jp/at/2025/at250024.html)
- [CVE.org record CVE-2025-66644](https://www.cve.org/CVERecord?id=CVE-2025-66644)
- [NVD entry CVE-2025-66644](https://nvd.nist.gov/vuln/detail/CVE-2025-66644)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644)
- [x.com](https://x.com/ArraySupport/status/1921373397533032590)
- [bleepingcomputer.com](https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-arrayos-ag-vpn-flaw-to-plant-webshells/)

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Source page: https://erroneo.us/security/cve/CVE-2025-66644/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt