CVE-2026-1772: Hitachienergy RTU520 Firmware

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface but requires further tools like browser development utilities to access them without required privileges.

Affected products

• Hitachienergy RTU520 Firmware: from 12.7.1, up to and including 12.7.7; from 13.5.1, up to and including 13.5.4; from 13.6.1, up to and including 13.6.2; from 13.7.1, before 13.7.8 (fixed in 13.7.8); version 13.8.1 only
• Hitachienergy RTU530 Firmware: from 12.7.1, up to and including 12.7.7; from 13.5.1, up to and including 13.5.4; from 13.6.1, up to and including 13.6.2; from 13.7.1, before 13.7.8 (fixed in 13.7.8); version 13.8.1 only
• Hitachienergy RTU540 Firmware: from 12.7.1, up to and including 12.7.7; from 13.5.1, up to and including 13.5.4; from 13.6.1, up to and including 13.6.2; from 13.7.1, before 13.7.8 (fixed in 13.7.8); version 13.8.1 only
• Hitachienergy RTU560 Firmware: from 12.7.1, up to and including 12.7.7; from 13.5.1, up to and including 13.5.4; from 13.6.1, up to and including 13.6.2; from 13.7.1, before 13.7.8 (fixed in 13.7.8); version 13.8.1 only

Published 2026-02-24. Last modified 2026-06-17.