CVE-2026-20732
Unknown
Unknown - Not Provided
Error Message Spoofing Vulnerability in F5 BIG-IP Configuration Utility
Publication date: 2026-02-04
Last updated on: 2026-02-13
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. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| f5 | big-ip_access_policy_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_advanced_firewall_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_advanced_web_application_firewall | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_analytics | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_application_acceleration_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_application_security_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_application_visibility_and_reporting | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_automation_toolchain | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_carrier-grade_nat | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_container_ingress_services | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_ddos_hybrid_defender | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_domain_name_system | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_edge_gateway | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_fraud_protection_service | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_global_traffic_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_link_controller | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_local_traffic_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_policy_enforcement_manager | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_ssl_orchestrator | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_webaccelerator | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_websafe | From 16.1.0 (inc) to 16.1.6 (inc) |
| f5 | big-ip_access_policy_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_access_policy_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_advanced_firewall_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_advanced_firewall_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_advanced_web_application_firewall | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_advanced_web_application_firewall | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_analytics | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_analytics | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_application_acceleration_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_application_acceleration_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_application_security_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_application_security_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_application_visibility_and_reporting | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_application_visibility_and_reporting | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_automation_toolchain | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_automation_toolchain | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_carrier-grade_nat | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_carrier-grade_nat | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_container_ingress_services | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_container_ingress_services | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_ddos_hybrid_defender | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_ddos_hybrid_defender | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_domain_name_system | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_domain_name_system | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_edge_gateway | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_edge_gateway | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_fraud_protection_service | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_fraud_protection_service | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_global_traffic_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_global_traffic_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_link_controller | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_link_controller | From 17.5.0. (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_local_traffic_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_local_traffic_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_policy_enforcement_manager | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_policy_enforcement_manager | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_ssl_orchestrator | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_ssl_orchestrator | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_webaccelerator | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_webaccelerator | From 17.5.0 (inc) to 17.5.1.4 (exc) |
| f5 | big-ip_websafe | From 17.1.0 (inc) to 17.1.3.1 (exc) |
| f5 | big-ip_websafe | From 17.5.0 (inc) to 17.5.1.4 (exc) |
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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in an undisclosed BIG-IP Configuration utility page and may allow an attacker to spoof error messages.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability could spoof error messages, potentially misleading users or administrators about the system's state or issues.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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