CVE-2026-63020: BIG-IP Configuration utility vulnerability

Severity: low (CVSS 3.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-02 · updated 2026-09-15
Weakness: CWE-451

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.

Affected products

F5 BIG-IP APM: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
BIG-IP: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Advanced Web Application Firewall: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Analytics: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Networks, Inc. BIG-IP (AAM): from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
BIG-IP ASM: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Application Visibility And Reporting: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Automation Toolchain: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Carrier-Grade Nat: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 BIG-IP Container Ingress Services: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Ddos Hybrid Defender: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 BIG-IP DNS: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Edge Gateway: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Fraud Protection Service: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Global Traffic Manager: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Link Controller: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 BIG-IP (LTM): from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Networks, Inc. BIG-IP (PEM): from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Ssl Orchestrator: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Webaccelerator: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0
F5 Big-Ip Websafe: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 21.0.0 through 21.1.0

References

https://my.f5.com/manage/s/article/K000161728

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