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Critical F5 BIG-IP Flaw Upgraded to 9.8 RCE, Exploited in the Wild

🗓️ 31 Mar 2026 11:36:21Reported by Deeba AhmedType 
hackread
 hackread
🔗 hackread.com👁 7 Views

Critical F5 BIG-IP APM flaw 2025-53521 is a 9.8 remote code execution, is actively exploited; patch now.

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31 Mar 2026 11:36Current
6.1Medium risk
Vulners AI Score6.1
CVSS 49.3
CVSS 3.19.8
EPSS0.02213
SSVC
7