CVE-2024-28022 Hitachi Energy CVE debrief

Who should care

Administrators and operators responsible for Hitachi Energy UNEM deployments, especially environments exposing the server or APIGateway to untrusted networks and sites running affected or end-of-life versions.

Technical summary

The CSAF advisory describes an authentication weakness in the UNEM server / APIGateway that permits repeated password attempts without effective restriction, enabling account access if the correct password is eventually tried. The advisory’s affected set includes UNEM R15A, R15B, R16A, R16B, and older-than-R15A versions. Remediation guidance differs by branch: update to UNEM R16B PC4 or R15B PC5 where applicable, and for EOL versions rely on general mitigation factors because no direct fix is planned.

Defensive priority

Medium

Recommended defensive actions

• Apply the vendor’s recommended update path where available: UNEM R16B PC4 or R15B PC5.
• For EOL releases, implement the vendor’s general mitigation factors and plan migration off unsupported versions.
• Restrict access to the UNEM server and APIGateway to trusted management networks only.
• Review authentication logs for repeated password attempts against targeted accounts.
• Follow CISA industrial control system defensive guidance for segmentation, least privilege, and defense in depth.

Evidence notes

The evidence corpus is a CISA CSAF security advisory for Hitachi Energy UNEM, with the same CVE identifier listed in the record and the vendor preview/reference links. The advisory states the impact, affected products, and remediation notes, including that some legacy versions have no direct remediation available. The provided enrichment shows no KEV listing and no ransomware campaign indicator.

Official resources