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.
Published: 2026-09-29
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 29 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Title Authentication Bypass in Hitachi Energy RTU500 Firmware Update Endpoint

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Hitachi Energy

Published:

Updated: 2026-09-29T15:54:11.550Z

Reserved: 2026-05-07T05:51:56.353Z

Link: CVE-2026-8065

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-29T10:17:13.110

Modified: 2026-09-29T16:17:14.187

Link: CVE-2026-8065

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-29T17:15:08Z

Weaknesses
  • CWE-306

    Missing Authentication for Critical Function