Medium severity · published Sep 29, 2026
CVE-2026-8067
An improper authorization vulnerability in the end-of-life versions of RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset…
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
An improper authorization vulnerability in the end-of-life versions of RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset endpoint. Successful exploitation could cause temporary device unavailability and disruption of its intended operation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RS
RTU500 series CMU firmware · Hitachi Energy
9.0 before 12.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8067
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-8067
publisher.hitachienergy.com
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000251&LanguageCode=en&DocumentPartId=&Action=Launch
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