CVE-2025-66644: Array Networks ArrayOS AG OS Command Injection Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 8 Dec 2025, 3 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 3.4%
EPSS score, percentile 88.8 of all scored records
- How severe?
- 7.2 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline 29 Dec 2025. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- before 9.4.5.9
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
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 due date for this action: 29 December 2025.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/ag.html
- https://www.jpcert.or.jp/at/2025/at250024.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-66644
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | before 9.4.5.9 |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
Array Networks ArrayOS AG contains an OS command injection vulnerability that could allow an attacker to execute arbitrary commands.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2025-66644 to its Known Exploited Vulnerabilities (KEV) catalog on 8 Dec 2025.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 29 Dec 2025.
- The CVE record was published on 5 Dec 2025, 3 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 7.2 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 3.4% (percentile 88.8), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
Array Networks ArrayOS AG before 9.4.5.9 allows command injection, as exploited in the wild in August through December 2025.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 5 Dec 2025 | CVE record published |
| 8 Dec 2025 | Added to CISA KEV |
| 29 Dec 2025 | CISA due date for the required action |
| 26 Feb 2026 | CVE record last updated |
References
More exploited Array Networks vulnerabilities
- CVE-2023-28461: Array Networks AG and vxAG ArrayOS Missing Authentication for Critical Function Vulnerability