Security readout for executives and security teams
Plain-English summary
CVE-2026-2460 affects Hitachi Energy Relion REB500 version 8.0.0.0. A low-privileged authenticated user may access and change directory contents through the DAC protocol without authorization. This is high severity because confidentiality and integrity impacts are rated high, but exploitation requires an account and higher attack complexity.
Executive priority
High for operators using Relion REB500 8.0.0.0 in OT environments. Prioritize asset identification, access review, and vendor-guided remediation. This is not presented as actively exploited in the provided sources.
Technical view
The CVE describes improper privilege handling, mapped to CWE-267, in Relion REB500 8.0.0.0. The CVSS 4.0 score is 7.6: network attack vector, high complexity, low privileges required, no user interaction, high vulnerable-system confidentiality and integrity impact, and no availability impact stated.
Likely exposure
Exposure appears limited to organizations running Hitachi Energy Relion REB500 version 8.0.0.0. Other versions are listed with default status unaffected in the provided CVE data. Risk depends on who can authenticate and reach the DAC protocol.
Exploitation context
The source bundle does not report active exploitation, and KEV status is false. Abuse requires a low-privileged authenticated user and access to the DAC protocol. The CVSS vector marks attack complexity as high and user interaction as not required.
Researcher notes
Evidence is limited to the CVE record and Hitachi Energy reference. No patch version or specific workaround is named in the provided bundle. Avoid assuming broader product impact beyond Relion REB500 8.0.0.0.
Mitigation direction
- Check Hitachi Energy’s advisory for fixed versions or vendor-approved mitigations.
- Inventory Relion REB500 deployments and identify version 8.0.0.0.
- Restrict DAC and management access to authorized users and trusted networks where feasible.
- Review low-privileged accounts with access to affected REB500 systems.
- Increase monitoring for unauthorized directory access or modification events.
Validation and detection
- Confirm whether any Relion REB500 asset runs version 8.0.0.0.
- Verify which users can authenticate to the affected system.
- Review whether DAC protocol access is limited to authorized administration paths.
- Check logs for unexpected directory reads or modifications by low-privileged accounts.
- Compare local remediation status against current Hitachi Energy guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-267: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-2460 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
7.6HighVector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Privilege Defined With Unsafe Actions
Privilege Defined With Unsafe Actions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.