A vulnerability exists in REB500 for an authenticated user with Installer role to access…
Priority LOW 35CWE-267Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Hitachi Energy | Relion REB500 | 8.0.0.0 – 8.3.3.0 | — | No fix listed | CNA |
- Relion REB500 VendorHitachi Energy Affected 8.0.0.0 – 8.3.3.0 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:hitachienergy:reb500_firmware:*:*:*:*:*:*:*:* | up to 8.3.3.0 | Vulnerable | Hitachi Energy |
| cpe:2.3:h:hitachienergy:reb500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Hitachi Energy |
- cpe:2.3:o:hitachienergy:reb500_firmware:*:*:*:*:*:*:*:* Versions up to 8.3.3.0 Vulnerable ·Hitachi Energy
- cpe:2.3:h:hitachienergy:reb500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Hitachi Energy
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2459
- 2026-10-03 Alias added: GHSA-8hm4-jmvc-cfg9
References
More Hitachi Energy Reb500 Firmware vulnerabilities
- TI-2022-03099 IEC 61850 MMS-Server Vulnerability in multiple Hitachi Energy Products CVSS 3.1HIGH 7.5
- TI-2021-08743 Specially Crafted IEC 61850 Protocol Sequence Vulnerability CVSS 3.1HIGH 7.5
- TI-2026-02089 A vulnerability exists in REB500 for an authenticated user with low-level privileges to… CVSS 4.0HIGH 7.6
Sources
- CVE-2026-2459 · CVE Program
- CVE-2026-2459 · NVD
- FIRST EPSS
- GHSA-8hm4-jmvc-cfg9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences