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

What is SMTP Smuggling and how can you deal with it?

There are quite a few articles on DevCentral discussing HTTP Request Smuggling (by myself and other authors) and SMTP Smuggling is very similar in concept – so if you haven’t read up on HTTP Request ...
Published Mar 07, 2024
Version 1.0
BIG-IP Advanced Firewall Manager (AFM)
big-ip afm
f5 sirt
security
SMTP Smuggling
AaronJB's avatar
Ret. Employee
20+ years in IT as a software developer, network engineer, *nix admin, security engineer and scruffy-looking nerf herder. Current holder of SANS GCIH, GWAPT and GPEN certifications as well as F5-CS and CTS-ASM certifications.
View Profile
Scheff's avatar
Scheff
Icon for Employee rankEmployee
Mar 22, 2024

This is a hot topic... I posted (am posting?) one on this but using ASM and Protocol Compliance to find it.  Proof that with BIG-IP, the answer is always "Yes," but the real question is "Which way?"