CVE-2016-9253: F5 BIG-IP Access Policy Manager

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

In F5 BIG-IP 12.1.0 through 12.1.2, specific websocket traffic patterns may cause a disruption of service for virtual servers configured to use the websocket profile.

Affected products

• F5 BIG-IP Access Policy Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Advanced Firewall Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Analytics: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Application Acceleration Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Application Security Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Domain Name System: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Link Controller: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Local Traffic Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Policy Enforcement Manager: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
• F5 BIG-IP Websafe: version 12.1.0 only; version 12.1.1 only; version 12.1.2 only

Published 2017-05-09. Last modified 2026-06-17.