CVE-2026-8067Network attack vector

Authenticated device reboot via unauthorized reset endpoint

Published Sep 29, 2026 · Updated Sep 29, 2026

Improper authorization in Hitachi Energy RTU500 Series CMU Firmware from 9.0 to before 12.0 lets remote authenticated users reboot RTUs. The RTU500 web application's reset endpoint accepts a reboot request from an authenticated account without enforcing authorization for that operation. Exploitation requires a valid account and access to the RTU web interface; the reboot temporarily interrupts device operation.

CVSS severityUnavailable
Unscored
EPSS probability0.32%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Hitachi Energy RTU500 Series CMU Firmware from 9.0 to before 12.0 lets remote authenticated users reboot RTUs. The RTU500 web application's reset endpoint accepts a reboot request from an authenticated account without enforcing authorization for that operation. Exploitation requires a valid account and access to the RTU web interface; the reboot temporarily interrupts device operation.

The record

CVE
CVE-2026-8067
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Hitachi Energy
Product
RTU500 Series CMU Firmware
Classifications
T0816
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0 <12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hitachi Energy · RTU500 Series CMU Firmwareversion=9.0 <12.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T0816Device Restart/Shutdown

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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