CVE-2026-21411: Plat'home Co.,ltd Openblocks IDM RX1 FW5.0.X

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may allow an attacker to bypass administrator authentication and change the password.

Affected products

• Plat'home Co.,ltd Openblocks IDM RX1 FW5.0.X
• Plat'home Co.,ltd Openblocks IoT DX1 FW5.0.X
• Plat'home Co.,ltd Openblocks IoT Ex/bx Models FW5.0.X
• Plat'home Co.,ltd Openblocks IoT FX1 FW5.0.X
• Plat'home Co.,ltd Openblocks IoT VX2 FW5.0.X
• Plat'home Co.,ltd Openblocks IX9 Models With Fw FW5.0.X

Published 2026-01-06. Last modified 2026-06-17.