CVE-2026-63020
Analyzed
Analyzed - Analysis Complete
BIG-IP Configuration Utility Error Message Spoofing
Vulnerability report for CVE-2026-63020, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-02
Last updated on: 2026-09-15
Assigner: F5 Networks
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| f5 | big-ip_access_policy_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_advanced_firewall_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_advanced_web_application_firewall | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_analytics | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_application_acceleration_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_application_security_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_application_visibility_and_reporting | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_automation_toolchain | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_carrier-grade_nat | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_container_ingress_services | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_ddos_hybrid_defender | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_domain_name_system | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_edge_gateway | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_fraud_protection_service | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_link_controller | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_local_traffic_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_policy_enforcement_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_ssl_orchestrator | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_webaccelerator | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_websafe | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_global_traffic_manager | From 17.5.0 (inc) to 17.5.1 (inc) |
| f5 | big-ip_access_policy_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_advanced_firewall_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_advanced_web_application_firewall | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_analytics | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_application_acceleration_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_application_security_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_application_visibility_and_reporting | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_automation_toolchain | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_carrier-grade_nat | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_container_ingress_services | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_ddos_hybrid_defender | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_webaccelerator | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_websafe | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_ssl_orchestrator | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_policy_enforcement_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_local_traffic_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_link_controller | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_global_traffic_manager | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_fraud_protection_service | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_edge_gateway | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_domain_name_system | From 17.1.0 (inc) to 17.1.3 (inc) |
| f5 | big-ip_access_policy_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_advanced_firewall_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_advanced_web_application_firewall | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_analytics | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_application_acceleration_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_application_security_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_application_visibility_and_reporting | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_automation_toolchain | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_carrier-grade_nat | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_container_ingress_services | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_ddos_hybrid_defender | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_domain_name_system | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_edge_gateway | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_fraud_protection_service | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_global_traffic_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_link_controller | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_local_traffic_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_policy_enforcement_manager | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_ssl_orchestrator | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_webaccelerator | From 21.0.0 (inc) to 21.1.0 (inc) |
| f5 | big-ip_websafe | From 21.0.0 (inc) to 21.1.0 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-451 | The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks. |
