CVE-2026-8065
CRITICAL
CVSS 9.1
Published: 2026-09-29
Modified: 2026-09-29
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Description
An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device.
Quick Facts
| CVE ID | CVE-2026-8065 |
| CVSS Score | 9.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| Published | 2026-09-29 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |