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CRITICAL
Vulnerabilities
CVE-2025-53521: CISA Warns of Active F5 BIG-IP APM RCE Exploitation
CISA adds CVE-2025-53521 to its KEV catalog following active exploitation of F5 BIG-IP APM. The critical RCE flaw carries a CVSS v4 score of 9.3.
Runtime Rebel Intel
4 min read·Mar 28, 2026
VU
CRITICAL
Vulnerabilities
CVE-2025-53521: F5 BIG-IP RCE — Patch Now for Active Exploitation
CISA adds CVE-2025-53521, an actively exploited F5 BIG-IP Remote Code Execution (RCE) vulnerability, to its KEV Catalog. Immediate patching is critical.
Runtime Rebel Intel
4 min read·Mar 28, 2026