ByteOS Network

NVD Vulnerability Details :

CVE-2026-2459

Analyzed

Source-cybersecurity@hitachienergy.com

Published At-24 Feb, 2026 | 14:16

Updated At-26 Feb, 2026 | 18:05

A vulnerability exists in REB500 for an authenticated user with Installer role to access and alter the contents of directories that the role is not authorized to do so.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	7.4	HIGH	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary	3.1	8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Type: Secondary

Version: 4.0

Base score: 7.4

Base severity: HIGH

Vector:

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Primary

Version: 3.1

Base score: 8.1

Base severity: HIGH

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CPE Matches

Hitachi Energy Ltd.

>>reb500_firmware>>Versions before 8.3.3.1(exclusive)

cpe:2.3:o:hitachienergy:reb500_firmware:*:*:*:*:*:*:*:*

Hitachi Energy Ltd.

>>reb500>>-

cpe:2.3:h:hitachienergy:reb500:-:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-267	Primary	cybersecurity@hitachienergy.com

CWE ID: CWE-267

Type: Primary

Source: cybersecurity@hitachienergy.com

References

Hyperlink	Source	Resource
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000217&LanguageCode=en&DocumentPartId=&Action=Launch	cybersecurity@hitachienergy.com	Vendor Advisory

Hyperlink: https://publisher.hitachienergy.com/preview?DocumentID=8DBD000217&LanguageCode=en&DocumentPartId=&Action=Launch

Source: cybersecurity@hitachienergy.com

Resource:

Vendor Advisory

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History