CVE-2026-21411
Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-21411- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-288
- Updated
- 2026-11-02
EUVDEUVD-2026-1070
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.
- Record
EUVD-2026-1070- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xm4x-3r5h-vwfr
Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may...
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.
- Record
GHSA-xm4x-3r5h-vwfr- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-288
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-21411- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-288
- Updated
- 2026-11-02
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)
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-21411 is a high vulnerability (CVSS 8.7) in Plat'home Co.,ltd. Openblocks Idm Rx1 (fw5.0.x), published January 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. No source names a fixed version.