SSH Key-Based Authentication Vulnerability in F5OS Systems
CVE-2025-36546

9.2CRITICAL

Key Information:

Vendor

F5
Status
F5os - Appliance
F5os - Chassis
Vendor
CVE Published:
7 May 2025

What is CVE-2025-36546?

On F5OS systems, enabling Appliance Mode does not disable SSH key-based authentication for root users who had previously configured it. This creates a pathway for attackers who can acquire the root user's SSH private key, potentially allowing unauthorized access to the system. As a result, systems may remain vulnerable even after security measures are enforced.

Affected Version(s)

F5OS - Appliance 1.7.0 < 1.8.0

F5OS - Appliance 1.5.1 < 1.5.3

F5OS - Chassis 1.6.0 < 1.8.0

References

https://my.f5.com/manage/s/article/K000140574
vendor-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
.
CVE-2025-36546 : SSH Key-Based Authentication Vulnerability in F5OS Systems