SB2026090744 - Spoofing attack in F5 BIG-IP configuration utility

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Main Vulnerability Database SB2026090744

SB2026090744 - Spoofing attack in F5 BIG-IP configuration utility

Published: September 7, 2026

Security Bulletin ID SB2026090744
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Spoofing attack (CVE-ID: CVE-2026-63020)

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

CVSSv4: 2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to spoof error messages in an authenticated BIG-IP user's Configuration utility web browser session.

The vulnerability exists due to user interface misrepresentation of critical information in an undisclosed BIG-IP Configuration utility page when authenticated BIG-IP users access malicious links. A remote attacker can trick authenticated BIG-IP users into accessing malicious links to spoof error messages in their Configuration utility web browser sessions.

This is a control plane issue with no data plane exposure.


Remediation

Install update from vendor's website.

References