CVE-2025-36546: F5 f5os-A

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• F5 f5os-A: from 1.5.1, before 1.5.3 (fixed in 1.5.3)
• F5 f5os-C: from 1.6.0, up to and including 1.6.2

Published 2025-05-07. Last modified 2026-06-17.