CVE-2025-66644: Array Networks exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

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.

Description quoted from the CVE record (assigned by mitre, published 2025-12-05).

Weakness: CWE-78 Improper Neutralization of Special Elements used in an OS Command (‘OS Command Injection’)

How it can be exploited

Exploitable over the network with low attack complexity needing high privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since: 2025-12-08
US federal deadline: 2025-12-29
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-16185, CNNVD-202512-639, EUVD-2025-201500, GHSA-hqfm-g725-ccqr

Exploit Observer links 1 piece of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (1)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Code repository: https://github.com/ashwesker/blackash-cve-2025-66644

Vulnerability databases and vendor advisories (5)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-201500
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-hqfm-g725-ccqr
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-66644
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202512-639

5 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.034
some chance of attack soon
VEDAS: 0.514
some exploit evidence
On CISA KEV: Yes, since 2025-12-08
Detection rule: None yet

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Array Networks ArrayOS AG	before 9.4.5.9	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: array_networks,_inc. arrayos, arraynetworks arrayos_ag.

How to fix it

Fixed versions stated in the CVE record: 9.4.5.9.

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.

Vendor guidance:

How to detect it

There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.

References

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644 (government-resource)

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.

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