What’s Vulnerable › Vulnerabilities

CVE-2026-21411

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-06 · updated 2026-06-17
• Weakness: CWE-288

Description

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): all versions prior to FW5.0.8
• Plat'Home Co.,Ltd. OpenBlocks IoT DX1 (FW5.0.x): all versions prior to FW5.0.8
• Plat'Home Co.,Ltd. OpenBlocks IoT EX/BX models (FW5.0.x): all versions prior to FW5.0.8
• Plat'Home Co.,Ltd. OpenBlocks IoT FX1 (FW5.0.x): all versions prior to FW5.0.8
• Plat'Home Co.,Ltd. OpenBlocks IoT VX2 (FW5.0.x): all versions prior to FW5.0.8
• Plat'Home Co.,Ltd. OpenBlocks IX9 models with FW (FW5.0.x): all versions prior to FW5.0.8

References

• https://jvn.jp/en/vu/JVNVU97172240/
• https://www.plathome.co.jp/support/software/fw5/dx1-v5-0-8/

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