CVE-2025-53856

When a virtual server, network address translation (NAT) object, or secure network address translation (SNAT) object uses the embedded Packet Velocity Acceleration (ePVA) feature, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  To determine which BIG-IP platforms have an ePVA chip refer to K12837: Overview of the ePVA feature https://my.f5.com/manage/s/article/K12837 .  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-25)

CWE

CWE-705

Published

2025-10-15

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• f5:big-ip_access_policy_manager
• f5:big-ip_advanced_firewall_manager
• f5:big-ip_advanced_web_application_firewall
• f5:big-ip_analytics
• f5:big-ip_application_acceleration_manager
• f5:big-ip_application_security_manager
• f5:big-ip_application_visibility_and_reporting
• f5:big-ip_automation_toolchain
• f5:big-ip_carrier-grade_nat
• f5:big-ip_container_ingress_services
• f5:big-ip_ddos_hybrid_defender
• f5:big-ip_domain_name_system
• f5:big-ip_edge_gateway
• f5:big-ip_fraud_protection_service
• f5:big-ip_global_traffic_manager
• f5:big-ip_link_controller
• f5:big-ip_local_traffic_manager
• f5:big-ip_policy_enforcement_manager
• f5:big-ip_ssl_orchestrator
• f5:big-ip_webaccelerator
• f5:big-ip_websafe

References

• https://my.f5.com/manage/s/article/K000156707

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