CVE-2018-5527: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

On BIG-IP 13.1.0-13.1.0.7, a remote attacker using undisclosed methods against virtual servers configured with a Client SSL or Server SSL profile that has the SSL Forward Proxy feature enabled can force the Traffic Management Microkernel (tmm) to leak memory. As a result, system memory usage increases over time, which may eventually cause a decrease in performance or a system reboot due to memory exhaustion.

Affected products

• F5 BIG-IP Access Policy Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Advanced Firewall Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Analytics: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Application Acceleration Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Application Security Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Domain Name System: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Edge Gateway: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Global Traffic Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Link Controller: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Local Traffic Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Policy Enforcement Manager: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Webaccelerator: from 13.0.0, up to and including 13.1.0.7
• F5 BIG-IP Websafe: from 13.0.0, up to and including 13.1.0.7

Published 2018-06-27. Last modified 2026-06-17.