CVE-2025-66644

Name: CVE-2025-66644
Creator: NVD / NIST
Published: 2025-12-05T19:15:53.293+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 3.05%

Last modified Jun 17, 2026

CVE-2025-66644 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.. CISA has confirmed active exploitation in the wild. EPSS estimates a 3.05% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.05%

85.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Dec 29, 2025.

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Arraynetworks	Arrayos Ag	< 9.4.5.9

References

https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-arrayos-ag-vpn-flaw-to-plant-webshells/Press/Media Coverage
https://www.jpcert.or.jp/at/2025/at250024.htmlThird Party Advisory
https://x.com/ArraySupport/status/1921373397533032590Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644US Government Resource

Timeline

Published: Dec 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66644?

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

How severe is CVE-2025-66644?

CVE-2025-66644 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.05% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-66644?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66644?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST