CVE-2016-9256: F5 BIG-IP Access Policy Manager

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

In F5 BIG-IP 12.1.0 through 12.1.2, permissions enforced by iControl can lag behind the actual permissions assigned to a user if the role_map is not reloaded between the time the permissions are changed and the time of the user's next request. This is a race condition that occurs rarely in normal usage; the typical period in which this is possible is limited to at most a few seconds after the permission change.

Affected products

F5 BIG-IP Access Policy Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Advanced Firewall Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Analytics: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Application Acceleration Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Application Security Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Domain Name System: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Link Controller: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Local Traffic Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Policy Enforcement Manager: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only
F5 BIG-IP Websafe: version 12.0.0 only; version 12.1.0 only; version 12.1.1 only; version 12.1.2 only

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