What’s Vulnerable › Vulnerabilities
CVE-2026-8065
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-29 · updated 2026-09-29
- Weakness: CWE-306
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.
Affected products
- Hitachi Energy RTU500 series CMU firmware: from 9.0 before 12.0 — fixed in 12.0
How to fix
Upgrade to a fixed version: Hitachi Energy RTU500 series CMU firmware 12.0. Check the vendor advisory for mitigations.
References
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