CVE-2025-36546

F5OS Appliance Mode vulnerability

State: Published
Severity: 9.2 Critical
Published: May 7, 2025
Updated: Feb 26, 2026
Reserved: Apr 23, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	f5
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	f5

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
F5OS - ApplianceF5	1.7.0 to before 1.8.0Affected 1.5.1 to before 1.5.3Affected
F5OS - ChassisF5	1.6.0 to before 1.8.0Affected

References

https://my.f5.com/manage/s/article/K000140574vendor-advisory

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