CVE-2026-39459

iControl REST and tmsh vulnerability

State: Published
Severity: 8.6 High
Published: May 13, 2026
Updated: May 14, 2026
Reserved: Apr 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	f5
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	f5

Weaknesses

CWE-272 Least Privilege Violation

Affected Products

Product	Versions
BIG-IPF5	21.1.0 and laterNot affected 21.0.0 to before 21.0.0.2Affected 17.5.0 to before 17.5.1.6Affected 17.1.0 to before 17.1.3.2Affected 16.1.0 and laterAffected

References

https://my.f5.com/manage/s/article/K000160863vendor-advisorypatch

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