CVE-2026-63020

EUVD-2026-70135
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.
UI
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
f5CNA
3.1 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12.82%
Affected Products (NVD)
VendorProductVersion
f5big-ip_access_policy_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_access_policy_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_advanced_firewall_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_advanced_firewall_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_advanced_web_application_firewall
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_advanced_web_application_firewall
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_analytics
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_analytics
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_application_acceleration_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_application_acceleration_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_application_security_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_application_security_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_application_visibility_and_reporting
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_application_visibility_and_reporting
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_automation_toolchain
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_automation_toolchain
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_carrier-grade_nat
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_carrier-grade_nat
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_container_ingress_services
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_container_ingress_services
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_ddos_hybrid_defender
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_ddos_hybrid_defender
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_domain_name_system
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_domain_name_system
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_edge_gateway
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_edge_gateway
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_fraud_protection_service
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_fraud_protection_service
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_global_traffic_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_global_traffic_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_link_controller
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_link_controller
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_local_traffic_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_local_traffic_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_policy_enforcement_manager
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_policy_enforcement_manager
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_ssl_orchestrator
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_ssl_orchestrator
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_webaccelerator
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_webaccelerator
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_websafe
17.1.0 ≤
𝑥
≤ 17.1.3
f5big-ip_websafe
17.5.0 ≤
𝑥
≤ 17.5.1
f5big-ip_access_policy_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_advanced_firewall_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_advanced_web_application_firewall
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_analytics
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_application_acceleration_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_application_security_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_application_visibility_and_reporting
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_automation_toolchain
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_carrier-grade_nat
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_container_ingress_services
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_ddos_hybrid_defender
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_domain_name_system
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_edge_gateway
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_fraud_protection_service
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_global_traffic_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_link_controller
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_local_traffic_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_policy_enforcement_manager
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_ssl_orchestrator
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_webaccelerator
21.0.0 ≤
𝑥
≤ 21.1.0
f5big-ip_websafe
21.0.0 ≤
𝑥
≤ 21.1.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
f5big-ip
21.1.0 ≤
𝑥
< 21.1.0.1
CNA
f5big-ip
21.0.0 ≤
𝑥
< 21.0.0.3
CNA
f5big-ip
17.5.0 ≤
𝑥
< 17.5.1.8
CNA
f5big-ip
17.1.0 ≤
𝑥
< 17.1.3.4
CNA