CVE-2026-28758: BIG-IP iControl REST vulnerability

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-13 · updated 2026-10-26
Weakness: CWE-312

Description

When BIG-IP DNS is provisioned, a vulnerability exists in the gtm_add and bigip_add iControl REST commands that return the ssh-password parameter in cleartext in the iControl REST response and is also logged in the audit log. This may allow a highly privileged, authenticated attacker with access to the audit log to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Affected products

F5 BIG-IP DNS: from 16.1.0 through 16.1.6; from 17.1.0 before 17.1.3.1; from 17.5.0 through 17.5.1 — fixed in 17.1.3.1

How to fix

Upgrade to a fixed version: F5 BIG-IP DNS 17.1.3.1. Check the vendor advisory for mitigations.

References

https://my.f5.com/manage/s/article/K000158070

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