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F5 BIG-IP RCE Bug Sparks Patch Panic

UK's NCSC just sounded the alarm on F5 BIG-IP's CVE-2025-53521. Active exploits mean remote code execution; patching isn't optional.

Elena Vasquez 📅 Apr 03, 2026 ⏱️ 3 min read 👁️ 0 views

⚡ Key Takeaways

CVE-2025-53521 enables RCE on F5 BIG-IP APM virtual servers, now actively exploited.
NCSC urges isolation, full investigation, and rebuilds over risky restores.
F5's history of state-sponsored breaches makes this a high-stakes repeat offender.

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#CVE-2025-53521 #F5 BIG-IP #NCSC advisory #RCE exploit #RCE vulnerability

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Originally reported by InfoSecurity Magazine