CVEs / CVE-2025-66644
CVE-2025-66644: Array Networks ArrayOS AG OS Command Injection Vulnerability
- Known exploited in the CISA KEV catalog since 8 Dec 2025
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 3.41% chance of exploitation in the next 30 days, higher than 88% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Array Networks ArrayOS AG contains an OS command injection vulnerability that could allow an attacker to execute arbitrary commands.
Description
Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Array Networks ArrayOS AG | before 9.4.5.9 | 9.4.5.9 |
Exploitation
| In CISA KEV since | 8 Dec 2025 |
|---|---|
| Due date for US federal agencies | 29 Dec 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-78 |
References
- CVE-2025-66644 on NVD
- CVE-2025-66644 in the CISA KEV catalog
- https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/ag.html (cited by CISA)
- https://www.jpcert.or.jp/at/2025/at250024.html (cited by CISA)
- 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.html Third Party Advisory
- https://x.com/ArraySupport/status/1921373397533032590 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66644 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.