Security News Hackers now exploit critical F5 BIG-IP flaw in attacks, patch now BleepingComputer Daniel Bender 30 Mar 2026 F5 has reclassified a BIG-IP APM denial-of-service (DoS) vulnerability as a critical-severity remote code execution (RCE) flaw, warning that attackers are exploiting it to deploy webshells on unpatched devices.