CVE-2026-8065
An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to...
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Assigning CNA
- Hitachi Energy
- Evidence observed
- Nov 5, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HLow · next 30 days
- Percentile
- 42.6%
- Model date
- Nov 4, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
Python PoC for CVE-2026-8065: fingerprints Hitachi Energy RTU500 devices and probes firmware update endpoints for unauthenticated upload, with check, exploit, and mass-scan modes.
Responsible use
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