Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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Zeeshan_Mohsin's avatar
Zeeshan_Mohsin
Icon for Nimbostratus rankNimbostratus
May 20, 2026

Layered ASM for APM login page protection

Has anyone successfully implemented 

https://my.f5.com/manage/s/article/K000149701

 

Full VPN clinets stop working after this implementation. 

 

I can see below errors

Client machines interface IPs are not falling under a private subnet or exception subnet ranges provided by the APM server

The connected network is vulnerable of tunnel crack as LocalIP falls under the public IPs

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