CVE-2020-5856: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

On BIG-IP 15.0.0-15.0.1.1 and 14.1.0-14.1.2.2, while processing specifically crafted traffic using the default 'xnet' driver, Virtual Edition instances hosted in Amazon Web Services (AWS) may experience a TMM restart.

Affected products

• F5 BIG-IP Access Policy Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Advanced Firewall Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Analytics: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Application Acceleration Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Application Security Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Domain Name System: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Fraud Protection Service: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Global Traffic Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Link Controller: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Local Traffic Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)
• F5 BIG-IP Policy Enforcement Manager: from 14.1.0, before 14.1.2.3 (fixed in 14.1.2.3); from 15.0.0, before 15.1.0 (fixed in 15.1.0)

Published 2020-02-06. Last modified 2026-06-17.