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CVE-2026-71377 – Unauthenticated OS Command Injection (RCE) – Hitachi Cosminexus Component Container

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Summary

CVE-2026-71377 is a critical command argument injection vulnerability (CWE-88) in the operation management agent component of Hitachi’s Cosminexus Component Container. The flaw allows an unauthenticated, remote attacker to inject malicious command arguments that are improperly neutralized before being passed to an underlying OS command, potentially resulting in full compromise of confidentiality, integrity, and availability of the affected host. Hitachi has assigned this a CVSS v3.1 base score of 9.8 (Critical) and released fixed versions on September 8, 2026.

Technical details

  • Root cause: The operation management agent within Cosminexus Component Container fails to properly neutralize argument delimiters when constructing OS-level commands (CWE-88, mapped to CAPEC-88: OS Command Injection), allowing attacker-supplied input to be interpreted as additional command arguments.
  • Trigger conditions: No authentication or user interaction is required to exploit the flaw; the vulnerable service simply needs to be reachable over the network.
  • Attack vector: Network (AV:N) — an attacker can send crafted requests directly to the exposed operation management agent to trigger the injection.
  • Impact: Successful exploitation can lead to arbitrary command execution on the underlying Windows host, with the vendor’s CVSS scoring indicating high impact to confidentiality, integrity, and availability (C:H/I:H/A:H).

Affected software

Hitachi Cosminexus Component Container (Windows platform), across the following product lines and version ranges (Developer, Application Server, Service Platform, and Primary Server Base variants):

  • 11-70-01 through 11-70-02 (fixed in 11-70-03)
  • 11-60 through 11-60-02 (fixed in 11-60-03)
  • 11-50 through 11-50-03
  • 11-40 through 11-40-03
  • 11-30 through 11-30-08
  • 11-20 through 11-20-09 (fixed in 11-20-10)
  • 11-10 through 11-10-11
  • 11-00 through 11-00-12
  • 09-87 through 09-87-09 (fixed in 09-87-10)
  • 09-80 through 09-80-04
  • 09-70 through 09-70-27 (fixed in 09-70-28, Windows x86)
  • 09-50 through 09-50-22
  • 09-00 through 09-00-18

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade to the fixed versions published by Hitachi:
    • Windows (x86): 09-70-28
    • Windows (x64): 09-87-10, 11-20-10, 11-60-03, 11-70-03
    • Additional mandatory configuration changes are required after patching — consult the vendor-provided Release.txt documentation for the exact settings needed to fully remediate the issue.
  • If immediate patching is not possible: Restrict network access to the Cosminexus operation management agent to trusted internal hosts only (e.g., via firewall rules or network segmentation), and avoid exposing the management interface directly to the internet until the fix and required configuration changes have been applied.

References

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