PoisonedRefresh Malware Backdoors F5 BIG-IP Servers With Memory-Only PHP Web Shells
Mon Sep 07 2026
Malware
Networking
Patch Management
Vulnerability
gbhackers.com
A sophisticated Linux implant linked to compromised F5 BIG-IP Access Policy Management (APM) environments. The activity has been associated with exploitation of CVE-2025-53521, an unauthenticated remote code execution flaw affecting BIG-IP APM when an access policy is configured on a virtual server. F5 has confirmed exploitation of the vulnerability and links the related compromise activity […]
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