CVE-2018-5537: F5 BIG-IP Access Policy Manager

Medium severity, CVSS 5.3. EPSS: 1.2% chance of exploitation in the next 30 days.

A remote attacker may be able to disrupt services on F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.2.1-11.5.6 if the TMM virtual server is configured with a HTML or a Rewrite profile. TMM may restart while processing some specially prepared HTML content from the back end.

Affected products

• F5 BIG-IP Access Policy Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Advanced Firewall Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.2; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Application Acceleration Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Application Security Manager: from 10.1.0, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Edge Gateway: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Global Traffic Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Local Traffic Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Policy Enforcement Manager: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Webaccelerator: from 11.2.1, up to and including 11.5.6; from 11.6.0, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5
• F5 BIG-IP Websafe: from 11.2.1, up to and including 11.5.6; from 11.6.1, up to and including 11.6.3.1; from 12.1.0, up to and including 12.1.3.5; from 13.0.0, up to and including 13.1.0.5

Published 2018-07-25. Last modified 2026-06-17.