critical Known exploitedREV. 01

CVE-2025-66644Array Networks ArrayOS — command injection on the gateway

Array Networks ArrayOS before 9.4.5.9 lets an attacker inject commands and run them on the remote access gateway. Attackers used it from August through December 2025 to plant web shells.

YOUR NEXT MOVE

Upgrade ArrayOS to 9.4.5.9 or later now; it was exploited for months to plant web shells, so sweep the appliance before trusting it again.

Read the risk

THE VITAL STATS
CVSS score
9.8/ 10
CVSS v3.1
EPSS probability
3%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2025-12-05
Added to KEV
2025-12-08
Exploit published
Not recorded
Confidence
high
Kill chain
initial access
MITRE ATT&CK
T1059
Severity
critical

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

Attacker needsNetwork access to the gateway; no credentials needed.

Fixed inArrayOS AG 9.4.5.9

Behind the card

4 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2025-66644 · CRDS 0.1 · Issued 2026-09-24