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CVE-2026-82825 – Unauthenticated Critical API Access – Hitachi Coding Software Suite ≤ 3.3.0

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Summary

CVE-2026-82825 is a critical missing-authentication vulnerability (CWE-306) affecting the Hitachi Coding Software Suite (HCSS), a client/server web application used to manage industrial coding and marking devices such as inkjet printers and vision systems. The flaw allows a remote, unauthenticated attacker to invoke critical application APIs over the network, potentially resulting in unauthorized retrieval or alteration of sensitive information, or unauthorized manipulation of connected devices. The issue affects all HCSS versions through 3.3.0 and has been assigned a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: Certain critical API endpoints in HCSS do not enforce authentication, allowing requests to reach sensitive functionality without any credentials.
  • Trigger conditions: An attacker only needs network access to the HCSS web application interface; no valid account, session token, or user interaction is required.
  • Attack vector: Network (remote, unauthenticated HTTP requests to exposed API endpoints).
  • Impact: Successful exploitation can lead to unauthorized retrieval or modification of sensitive data, and unauthorized manipulation of the application’s critical functions — affecting confidentiality, integrity, and availability of the HCSS deployment and the coding/marking devices it manages.
  • Classification: Mapped to CAPEC-1 (Accessing Functionality Not Properly Constrained by ACLs).
  • Credit: The vulnerability was reported to Hitachi by researcher Michael Heinzl.

Affected software

  • Hitachi Coding Software Suite — all versions through 3.3.0

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • (Hitachi’s advisory also lists a CVSS v4.0 score of 9.3)

Mitigation and recommended actions

  • Immediate: Upgrade Hitachi Coding Software Suite to version 4.0.0 or later, which addresses this vulnerability.
  • If immediate patching is not possible: Restrict network access to the HCSS web application and its API endpoints to trusted management networks only, and ensure the application is not directly exposed to the internet, as an interim risk-reduction measure until the upgrade can be applied.

References

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