Exploited vulnerability · CISA KEV

Is CVE-2025-66644 exploited? Yes: in CISA KEV since 8 Dec 2025

Gociux · Array Networks ArrayOS AG · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-66644, Array Networks ArrayOS AG OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 8 Dec 2025, 3 days after it was published. It affects Array Networks ArrayOS AG, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

Array Networks ArrayOS AG contains an OS command injection vulnerability that could allow an attacker to execute arbitrary commands.

What to do

1. Check whether you run it. Look for ArrayOS AG in your asset inventory, including appliances and cloud images. Stack check lists every exploited Array Networks CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 5 Dec 2025.
4. Get told next time. Email alerts when CISA adds a CVE for Array Networks.

References

• support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/ag.html
• www.jpcert.or.jp/at/2025/at250024.html
• nvd.nist.gov/vuln/detail/CVE-2025-66644

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2025 · Array Networks scorecard · act-now radar.