CVE-2026-40061

High

Description

When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed iControl REST and BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with the Resource Administrator or Administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

SeverityHigh

CVSS8.7

Exploit probability—

Product

F5 Big-ip Domain Name System

PublishedMay 13, 2026

First seenMay 13, 2026

Weakness typeCWE-77Command injection

How to fix

Patches

my.f5.com/manage/s/article/K000160788

Affected products

Product	Affected versions	Fixed in
f5 big-ip_domain_name_system	16.1.0 ≤ v ≤ 16.1.6, 17.1.0 ≤ v ≤ 17.1.3, 17.5.0 ≤ v ≤ 17.5.1, 21.0.0	—

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