Review: TerraMaster ups its NAS game with the excellent four-bay F4-423

TerraMaster just gave its mainstream four-bay NAS a colossal upgrade.

TerraMaster is renowned within the NAS community for producing more affordable enclosures with similar specifications. The company's OS was mostly the weaker point as well as a less polished overall user experience. This is changing with the release of TOS 5.0 with some big changes, and the F4-423 is set to take full advantage of the new operating system.

The TerraMaster F4-423 is a four-bay NAS with some high-end specifications. Replacing the aging F4-421, this latest four-bay enclosure has ditched the Intel Celeron J series of processors, upgraded to DDR4 RAM, implemented 2.5Gb LAN, and added two M.2 slots. These features are usually reserved for premium NAS enclosures, but TerraMaster is bringing them to a lower price.

I've continuously recommended TerraMaster NAS as the better value enclosures, so read on to find out whether the F4-423 is a serious contender for the best NAS crown.



TerraMaster F4-423 revi...

nmap -sV --script vuln -p- <target-network>

tail -f /var/log/suricata/fast.log | grep <cve>

Check Vendor Security Advisory Bulletin

title: Detect Exploitation - Review: TerraMaster ups its NAS game with the excellent four-bay F4-423
id: c5364f7d-24b7-4778-b514-1f5c7a066304
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
  - https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
  category: network_connection
  product: any
detection:
  selection:
      CommandLine|contains:
        - 'exploit'
  condition: selection
falsepositives:
  - Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
  - attack.initial_access

rule CTI_Threat_Indicator {
    meta:
        author = "iShareStuff CTI Automated Detection Engine"
        date = "2026-09-24"
        description = "YARA Signature for "
    strings:
        $str = "Review: TerraMaster ups its NA" ascii wide
    condition:
        any of them
}