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CVE Record

CVE-2021-20740: Hitachi Virtual File Platform Versions prior to 5.5.3-09 and Versions prior to 6.4.3-09, and NEC Storage M...

Hitachi Virtual File Platform Versions prior to 5.5.3-09 and Versions prior to 6.4.3-09, and NEC Storage M Series NAS Gateway Nh4a/Nh8a versions prior to FOS 5.5.3-08(NEC2.5.4a) and Nh4b/Nh8b, Nh4c/Nh8c versions prior to FOS 6.4.3-08(NEC3.4.2) allow remote authenticated attackers to execute arbitrary OS commands with root privileges via unspecified vectors.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue lets a remote authenticated attacker run operating-system commands as root on affected Hitachi Virtual File Platform and NEC Storage M Series NAS Gateway systems. For executives, the business concern is potential full compromise of storage infrastructure if vulnerable versions remain deployed.

Executive priority

Prioritize remediation where these storage systems support critical business data or shared file services. Root-level command execution on storage infrastructure can affect confidentiality, integrity, and availability.

Technical view

CVE-2021-20740 is an authenticated remote OS command execution flaw in specified Hitachi Virtual File Platform and NEC NAS Gateway versions using Hitachi VFP. The vectors are unspecified in the provided sources, and no CVSS or CWE data is included.

Likely exposure

Exposure is most likely in organizations still operating the named Hitachi or NEC NAS platforms below the fixed version thresholds, especially where authenticated management access is broadly reachable.

Exploitation context

The provided bundle does not show CISA KEV listing or active exploitation. The attack is authenticated, but successful exploitation can execute arbitrary OS commands with root privileges, making impact potentially severe.

Researcher notes

Evidence is strong for affected products and fixed version thresholds, but incomplete for exploit mechanics. Sources describe unspecified vectors, no CVSS, no CWE, and no confirmed exploitation signal in the provided bundle.

Mitigation direction

  • Upgrade Hitachi Virtual File Platform to 5.5.3-09, 6.4.3-09, or later as applicable.
  • Upgrade NEC Nh4a/Nh8a to FOS 5.5.3-08(NEC2.5.4a) or later.
  • Upgrade NEC Nh4b/Nh8b/Nh4c/Nh8c to FOS 6.4.3-08(NEC3.4.2) or later.
  • Check Hitachi and NEC advisories for product-specific upgrade instructions or additional mitigations.
  • Limit authenticated management access to trusted administrators and restricted networks.

Validation and detection

  • Inventory Hitachi Virtual File Platform and NEC Storage M Series NAS Gateway deployments.
  • Compare installed versions against the affected version ranges in vendor and JVN advisories.
  • Review management access paths and authenticated user lists for unnecessary reachability.
  • Check vendor advisories for any model-specific notes before remediation.
  • After upgrade, confirm systems report fixed firmware or platform versions.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-20740 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Hitachi and NEC CorporationHitachi Virtual File Platform and NEC Storage M Series NAS Gateway which uses Hitachi Virtual File PlatformHitachi Virtual File Platform Versions prior to 5.5.3-09 and Versions prior to 6.4.3-09, and NEC Storage M Series NAS Gateway Nh4a/Nh8a versions prior to FOS 5.5.3-08(NEC2.5.4a) and Nh4b/Nh8b, Nh4c/Nh8c versions prior to FOS 6.4.3-08(NEC3.4.2)Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.