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CVE-2026-21411

HIGH
8.7
CVSS Score
Published: January 6, 2026 at 06:34 AM UTC
Updated: June 17, 2026 at 10:18 AM UTC
7 products affected across 1 vendorOpenBlocks IoT VX2OpenBlocks IX9OpenBlocks IoT BX

Using OpenBlocks IoT DX1 (FW5.0.x) by Plat'Home Co.,Ltd.?

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHjpcert
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-288

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