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CVE-2025-61951

High

Description

Undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  This issue may occur when a Datagram Transport Layer Security (DTLS) 1.2 virtual server is enabled with a Server SSL profile that is configured with a certificate, key, and the SSL Sign Hash set to ANY, and the backend server is enabled with DTLS 1.2 and client authentication.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

SeverityHigh
CVSS7.5
Exploit probability—
ProductF5 Big-ip Access Policy Manager
PublishedOct 15, 2025
First seenOct 15, 2025
Weakness typeCWE-125Out-of-bounds read

How to fix

Update
  • f5 big-ip_access_policy_manager16.1.6.1, 17.1.3 or later
  • f5 big-ip_advanced_firewall_manager16.1.6.1, 17.1.3 or later
  • f5 big-ip_advanced_web_application_firewall16.1.6.1, 17.1.3 or later
  • f5 big-ip_analytics16.1.6.1, 17.1.3 or later
  • f5 big-ip_application_acceleration_manager16.1.6.1, 17.1.3 or later
  • f5 big-ip_application_security_manager16.1.6.1, 17.1.3 or later
  • f5 big-ip_application_visibility_and_reporting16.1.6.1, 17.1.3 or later
  • f5 big-ip_automation_toolchain16.1.6.1, 17.1.3 or later
  • f5 big-ip_carrier-grade_nat16.1.6.1, 17.1.3 or later
  • f5 big-ip_container_ingress_services16.1.6.1, 17.1.3 or later
  • f5 big-ip_ddos_hybrid_defender16.1.6.1, 17.1.3 or later
  • f5 big-ip_domain_name_system16.1.6.1, 17.1.3 or later
Vendor advisories

Affected products

ProductAffected versionsFixed in
f5 big-ip_access_policy_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_advanced_firewall_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_advanced_web_application_firewall16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_analytics16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_application_acceleration_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_application_security_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_application_visibility_and_reporting16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_automation_toolchain16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_carrier-grade_nat16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_container_ingress_services16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_ddos_hybrid_defender16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_domain_name_system16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_edge_gateway16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_fraud_protection_service16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_global_traffic_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_link_controller16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_local_traffic_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_policy_enforcement_manager16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_ssl_orchestrator16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_webaccelerator16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3
f5 big-ip_websafe16.1.0 ≤ v < 16.1.6.1, 17.1.0 ≤ v < 17.1.3, 17.5.016.1.6.1, 17.1.3

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CVE-2025-61951 · F5 Big-ip Access Policy Manager · Dark Radar