CVE-2026-2460 Missing authorization in Relion REB500
Authenticated low-privilege users can bypass authorization to access and modify unauthorized directories via the DAC protocol in Hitachi Energy Relion REB500.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2460?
CVE-2026-2460 is a high-severity missing authorization vulnerability in Hitachi Energy Relion REB500, published on 24 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability exists in REB500 for an authenticated user with low-level privileges to access and alter the content of directories by using the DAC protocol that the user is not authorized to do so.
Weakness: CWE-267
Which versions are affected by CVE-2026-2460?
It affects 1 product.
Products include Hitachienergy Reb500 Firmware.
How do I fix CVE-2026-2460?
No fix has been published for CVE-2026-2460 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-2460 being exploited?
There is no known exploitation of CVE-2026-2460 in the wild and no public exploit code.
Other vulnerabilities in Hitachi Energy Relion REB500
Sources
Also known as GHSA-mg9m-c3pr-5p64.