CVE-2026-63020

BIG-IP Configuration utility vulnerability

State: Published
Severity: 2.3 Low
Published: Sep 2, 2026
Updated: Sep 2, 2026
Reserved: Jul 24, 2026

Description

A vulnerability exists in an undisclosed BIG-IP Configuration utility page that may allow an attacker to spoof error messages

Impact:

An attacker may trick authenticated BIG-IP users into accessing malicious links and reflect a spoofed error message in the victim's BIG-IP Configuration utility web browser session. This is a control plane issue; there is no data plane exposure.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	f5
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N	f5

Weaknesses

CWE-451 User Interface (UI) Misrepresentation of Critical Information

Affected Products

Product	Versions
BIG-IPF5	21.1.0 to before 21.1.0.1Affected 21.0.0 to before 21.0.0.3Affected 17.5.0 to before 17.5.1.8Affected 17.1.0 to before 17.1.3.4Affected

References

https://my.f5.com/manage/s/article/K000161728vendor-advisory

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