CVE-2026-8066
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 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.
| CWE | CWE-23 |
| Vendor | hitachi energy |
| Product | rtu500 series cmu firmware |
| Published | Sep 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for hitachi energy rtu500 series cmu firmware
Be the first to know when new critical vulnerabilities affecting hitachi energy rtu500 series cmu firmware are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
Hitachi Energy / RTU500 series CMU firmware
9.0 < 12.0