CVE-2020-5891: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

On BIG-IP 15.1.0-15.1.0.1, 15.0.0-15.0.1.2, and 14.1.0-14.1.2.3, undisclosed HTTP/2 requests can lead to a denial of service when sent to a virtual server configured with the Fallback Host setting and a server-side HTTP/2 profile.

Affected products

• F5 BIG-IP Access Policy Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Advanced Firewall Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Analytics: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Application Acceleration Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Application Security Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Fraud Protection Service: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Link Controller: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Local Traffic Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1
• F5 BIG-IP Policy Enforcement Manager: from 14.1.0, up to and including 14.1.2.3; from 15.0.0, up to and including 15.0.1.2; from 15.1.0, up to and including 15.1.0.1

Published 2020-04-30. Last modified 2026-06-17.