Arbitrary Cmd Exec via Privileged Role in F5 BIG-IP iControl REST/TMOS Shell
CVE-2026-39459 Published on May 13, 2026

iControl REST and tmsh vulnerability
A vulnerability exists in iControl REST and the TMOS Shell (tmsh) where a highly privileged, authenticated attacker with at least the Manager role can create configuration objects that allow running arbitrary commands.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-39459 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Least Privilege Violation

The elevated privilege level required to perform operations such as chroot() should be dropped immediately after the operation is performed.


Products Associated with CVE-2026-39459

Want to know whenever a new CVE is published for F5 Networks Big Ip? stack.watch will email you.

F5 Networks Big Ip
 

Affected Versions

F5 BIG-IP: