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TI-2026-07105 Aliases CVE-2026-8066GHSA-27cq-c5r3-854p

Path traversal in Hitachi Energy RTU500 series CMU firmware

Priority MEDIUM 47CWE-23Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00736 54th percentileScored 2026-11-07
Fix Fixed RTU500 series CMU firmware (Hitachi Energy): 12.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Hitachi EnergyRTU500 series CMU firmware9.0 to before 12.012.0Patch availableCNA
  • RTU500 series CMU firmware VendorHitachi Energy Affected 9.0 to before 12.0 Fixed in 12.0 Patch available CNA

Remediation

  • Fix · CNA RTU500 series CMU firmware (Hitachi Energy) Fixed in 12.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Hitachi Energy RTU500 series CMU firmware 12.0

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-07104 Missing authentication in Hitachi Energy RTU500 series CMU firmwarePriority MEDIUM 46
    • TI-2026-07106 Missing authorization in Hitachi Energy RTU500 series CMU firmwarePriority LOW 28
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-8066
  2. 2026-10-03 Alias added: GHSA-27cq-c5r3-854p

References

Other 1

  • TI-2019-03985 ABB MicroSCADA Pro SYS600 Missing Authentication for Critical Function CVSS 3.1CRITICAL 9.8
  • TI-2018-10635 Improper authentication in ICS-CERT ABB eSOMS CVSS 3.0CRITICAL 9.8
  • TI-2024-01871 Heap-based buffer overflow in Hitachi Energy FOXMAN-UN CVSS 3.1CRITICAL 9.8
  • TI-2019-13270 Path traversal in Relion 670 Series CVSS 3.1CRITICAL 10.0
  • TI-2026-07104 Missing authentication in Hitachi Energy RTU500 series CMU firmware CVSS 3.1CRITICAL 9.1
  • TI-2026-01456 IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of… CVSS 4.0HIGH 8.7
See all 146 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences