F5 BIG-IP Vulnerability CVE-2025-53521 Reclassified from DoS to RCE Under Active Exploitation

The vulnerability CVE-2025-53521, initially disclosed in October as a high-severity denial-of-service (DoS) flaw affecting F5 BIG-IP systems, has been reclassified as a remote code execution (RCE) vulnerability. New information revealed the bug poses a significantly greater risk than originally assessed. The flaw is currently under active exploitation, though specific threat actors or attack vectors are not detailed. No additional technical details, affected versions, or mitigation steps were provided in the report.