Vulnerability in Plat'home Co.,ltd. Openblocks Idm Rx1 (Fw5.0.x)
CVE-2026-21411
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.
EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Plat'home Co.,ltd. Openblocks Idm Rx1 (Fw5.0.x) — versions all versions prior to FW5.0.8
- Plat'home Co.,ltd. Openblocks Iot Dx1 (Fw5.0.x) — versions all versions prior to FW5.0.8
- Plat'home Co.,ltd. Openblocks Iot Ex/bx Models (Fw5.0.x) — versions all versions prior to FW5.0.8
- Plat'home Co.,ltd. Openblocks Iot Fx1 (Fw5.0.x) — versions all versions prior to FW5.0.8
- Plat'home Co.,ltd. Openblocks Iot Vx2 (Fw5.0.x) — versions all versions prior to FW5.0.8
- Plat'home Co.,ltd. Openblocks Ix9 Models With Fw (Fw5.0.x) — versions all versions prior to FW5.0.8
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-21411?
- CVE-2026-21411 is a high-severity vulnerability in Plat'home Co.,ltd. Openblocks Idm Rx1 (Fw5.0.x), classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.8/10. Published 2026-01-06.
- How severe is CVE-2026-21411?
- High severity. CVSS v3 base score is 8.8 out of 10.