BIG-IQ and F5OS
CVE-2025-36546: F5OS Appliance Mode vulnerability
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| F5OS - Appliance 1.7 | 1.8.0 or later |
| F5OS - Appliance 1.5 | 1.5.3 or later |
| F5OS - Chassis 1.6 | 1.8.0 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH private key.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.