Alerts warn F5 BIG-IP vulnerability being exploited for malicious activity 

The Cybersecurity and Infrastructure Security Agency released an alert March 27 on a vulnerability in F5 BIG-IP Access Policy Manager software that is being exploited for malicious cyber activity. F5 devices and software, used widely by health care and other critical infrastructure, provide app security and management services. The vulnerability was previously disclosed in October 2025 as a denial-of-service issue but was reclassified this month due to new information that found the vulnerability allows malicious actors to perform remote code execution, according to an alert from F5. 
 
“F5 has determined that this issue is much more severe than previously thought,” said Scott Gee, AHA deputy national advisor for cybersecurity and risk. “The original patch released last year fixes the larger issue, so if you are using F5’s BIG-IP software, a very common app delivery and security service, ensure that you patch the system as soon as possible.” 
 
For more information on this or other cyber and risk issues, contact Gee at sgee@aha.org. For the latest cyber and risk resources and threat intelligence, visit aha.org/cybersecurity.