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CVE-2026-21411

HIGH CVSS 4.0: 8.7 EPSS 0.05%
Updated Jan 08, 2026
Authentication
Parameter Value
CVSS 8.7 (HIGH)
Type CWE-288 (Authentication Bypass Using Alternate Path)
Vendor Authentication
Public PoC No

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 Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0