Cyber Resilience

CVE-2021-20740

HighRCE

Published: 28 June 2021

Published
28 June 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0237 85.3th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-20740 is a high-severity OS Command Injection (CWE-78) vulnerability in Hitachi Virtual File Platform. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 14.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

arbitrary OS commands with root privileges via unspecified vectors.

CWE(s)
CWE-78

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

hitachi
virtual file platform
≤ 6.4.3-09 · ≤ 5.5.3-09
nec
nas gateway nh4a firmware
≤ fos_5.5.3-08\(nec2.5.4a\)
nec
nas gateway nh8a firmware
≤ fos_5.5.3-08\(nec2.5.4a\)
nec
nas gateway nh4b firmware
≤ fos_6.4.3-08\(nec3.4.2\)
nec
nas gateway nh8b firmware
≤ fos_6.4.3-08\(nec3.4.2\)
nec
nas gateway nh4c firmware
≤ fos_6.4.3-08\(nec3.4.2\)
nec
nas gateway nh8c firmware
≤ fos_6.4.3-08\(nec3.4.2\)

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References