Bug ID 2141133: ASM missing event log for request with large amount of illegal parameters

Last Modified: Sep 18, 2026

Affected Product(s):
BIG-IP ASM(all modules)

Fixed In:
21.1.0, 17.5.1.9, 17.1.3.5

Opened: Oct 29, 2025

Severity: 3-Major

Symptoms

ASM missing event log

Impact

Missing event log

Conditions

ASM policy linked to a virtual server, logging profile associated with a virtual server, request containing a large number of parameters, all of which are illegal

Workaround

None

Fix Information

Increased logging buffer size per parameter

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips