CVE-2026-21411: High severity OpenBlocks OpenBlocks vulnerability
Published Jan 6, 2026
·Updated
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 Software
1 affected component
OpenBlocks OpenBlocks<FW5.0.8
Event History
Jan 6, 2026
CVE Published
via MITRE·06:34 AM
Data Sourced
via MITRE·06:34 AM
DescriptionSeverity
Data Sourced
via NVD·07:15 AM
DescriptionSeverityWeakness
Dec 2, 58043
Event
via FIRST·12:43 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-21411?
CVE-2026-21411 is classified as a high severity vulnerability due to its potential to allow unauthorized access to sensitive administrative functions.
2
How do I fix CVE-2026-21411?
To mitigate CVE-2026-21411, upgrade your OpenBlocks software to version FW5.0.8 or later.
3
What systems are affected by CVE-2026-21411?
CVE-2026-21411 affects all OpenBlocks series versions prior to FW5.0.8.
4
What type of vulnerability is CVE-2026-21411?
CVE-2026-21411 is an authentication bypass issue that allows attackers to change administrator passwords.
5
Can CVE-2026-21411 be exploited remotely?
Yes, CVE-2026-21411 can be exploited remotely by an attacker to gain unauthorized access to the system.