How severe is CVE-2025-66644?

CVE-2025-66644 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66644 being actively exploited?

Yes. CVE-2025-66644 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-12-08, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-66644?

CVE-2025-66644 affects Arraynetworks Arrayos Ag. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66644?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-66644 have an EU (EUVD) identifier?

Yes. CVE-2025-66644 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201500. It is also flagged as exploited in the EUVD (since 2025-12-08).

When was CVE-2025-66644 published?

CVE-2025-66644 was published on 2025-12-05 and last updated on 2026-06-17.

CVE-2025-66644

CVE-2025-66644 is a high-severity vulnerability in Arraynetworks Arrayos Ag with a CVSS 3.x base score of 7.2. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-12-08). The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-12-08)
EU (EUVD) id: EUVD-2025-201500
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-12-08)
Weakness: CWE-78
Affected product: Arraynetworks Arrayos Ag
Published: 2025-12-05
Last modified: 2026-06-17

Description

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

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 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66644 being actively exploited?: Yes. CVE-2025-66644 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-12-08, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-66644?: CVE-2025-66644 affects Arraynetworks Arrayos Ag. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66644?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-66644 have an EU (EUVD) identifier?: Yes. CVE-2025-66644 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201500. It is also flagged as exploited in the EUVD (since 2025-12-08).
When was CVE-2025-66644 published?: CVE-2025-66644 was published on 2025-12-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:arraynetworks:arrayos_ag:*:*:*:*:*:*:*:*

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