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Web Security

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critical CVE-2025-53521 Malware

F5 BIG-IP APM Malware Hides Web Shell in Apache Memory to Evade Disk Scans

Security researchers have uncovered a sophisticated malware implant targeting F5 BIG-IP Access Policy Manager (APM) appliances that can conceal a PHP web shell entirely within Apache process memory, allowing attackers to maintain server-side code execution while leaving the targeted PHP files on disk unchanged.

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